Cross-Play between consoles and PC is coming to Overwatch! Blizzard have detailed this excellent new addition, which will connect all platforms and regions (aside from China) and everyone gets  a golden loot boy to celebrate! This is also very likely in prepration for Overwatch 2, which still doesn't have a solid release date.

There's a developer update video, more info and a huge FAQ below:
Crossplay (Source)
Cross-Play is coming to Overwatch soon, allowing players to group up and play together. Powered by the latest global Battle.net update, players from around the world can team up, regardless of their preferred platform*. With the release of cross-play, all players will need to make a Battle.net account and link their appropriate console accounts. With the launch of Cross-Play, everyone who logs in to Overwatch by the end of 2021 will receive a Golden Loot Box to celebrate.
Check out our resources below to get all of your questions answered.
  Prepare Your Account
All console players will be required to make a Battle.net account and link it to their console (Xbox, PSN, Nintendo) account. PC players do not need to take this step – You already have a Battle.net account. Upon launching the game, you will be prompted to link your console account to a Battle.net account. Follow the steps below to create a Battle.net account, then link your console game account to your Battle.net account.
  Creating a Battle.net Account
Visit Battle.net Create a free Battle.net account Once you create your Battle.net account, go to your Account Settings Click on the “Connections” section under Account Settings and link your console   Linking Your Console Game and Battle.net Accounts
These instructions apply to the in-game steps console players will need to take once Cross-Play is available.
Launch the game on your system Press the confirmation button to progress through the Overwatch welcome screen You will be presented with an alpha-numeric code and a QR code The alpha-numeric code can be entered at blizzard.com/link The QR code may be scanned with a mobile app to take you to the linking webpage, which will be pre-populated with the code provided in-game Log in with your Battle.net account credentials to finalize the connection between your console game and Battle.net accounts You will receive a message in-game that notifies that your account is now successfully connected Exit and relaunch Overwatch  
Cross-play Frequently Asked Questions
Account Linking
How do I link my Battle.net account to my console?
  Step 1: Visit Battle.net Step 2: Create a free Battle.net account Step 3: Once you create your Battle.net account, go to your Account Settings Step 4: Click on the “Connections” section under Account Settings and link your console
  Will I need to create a Battle.net account even if I don’t plan to use cross-play?
  Console Players: Yes. With the addition of the cross-play feature, all players will need to setup a Battle.net account or connect to an existing Battle.net account. PC Players: No, you already have a Battle.net account.
  I play on PC, what do I need to do? Nothing! Keep enjoying Overwatch and welcome your new console friends by grouping up and playing matches.
What systems are supported with the cross-play feature? Cross-play is coming to all systems where Overwatch is currently available: PC, Xbox One, Xbox Series X, Xbox Series S, PlayStation 4, PlayStation 5, and the Nintendo Switch.
Will I receive the Golden Loot Box on just one system? Players will receive one Golden Loot Box everywhere they play Overwatch (PC, Xbox, PlayStation, Nintendo Switch) even if they’re associated with the same Battle.net account.
 
Progress and Leaderboards
Will my progression carry over between systems? No. While cross-play will allow you to group up with friends using other systems, no progress and collection content will carry over between sessions on different systems.
Will stats be reset when cross-play launches? No.
Will ranks (SR) be reset at cross-play launch? No.
Will top 500 leaderboards include players from other systems? There will be separate leaderboards for PC players, cross-play enabled console players, and cross-play disabled console players.
  Social Features
Will I use my console handle (Xbox Username, PSN ID, etc) or my Battletag during console matches? Once you’ve linked your console and Battle.net accounts, you will display your Blizzard Battletag during matches. There are specific cases where your console handle will be displayed such as friend lists and top 500 lists.
Will other players be able to see my Real ID after I link my Battle.net account? Being able to see another player’s Real ID (real name) is contingent upon account settings. To learn more, visit our support page at https://battle.net/support/article/23686
If I add a friend on the same console, will they be my friend on both PSN/Xbox/Switch and Battle.net? Adding a friend through the Overwatch game will make them your Battle.net friend. If you wish to add a friend on the same console without them also being a Battle.net friend, you can use your console’s native social menus.
If I opt-out of cross-play, will I still see Battle.net friends on my friends list or only PSN/Xbox/Switch friends? No, if you choose to opt out of cross-play, you will not see your Battle.net friends on your friends list.
How will bans work? For example, if my game account is banned on PC, can I no longer play on other systems? Can I link banned game accounts? Account bans are determined at the game level (for clarity’s sake, we’ll refer to this as a “game account”). For example, if a player’s game account is banned on PC, they will still be able to use game account(s) tied to their Battle.net account to play Overwatch on console unless they have been banned for a more serious offense. If a player’s Battle.net account has been closed due to repeat or severe offenses, they will not be able to log-in and will need a new copy of Overwatch and Battle.net account to play the game.
Can I add friends, report, mute, avoid, and block players from other systems? Yes.
Can I use voice chat to talk to players on other systems? Yes.
 
Matchmaking and Game Modes
Will cross-play be enabled for all game modes? Cross-play is enabled for all game modes with an exception for Competitive games. Competitive players will be split into two pools depending on the system that they are playing on: 1) Console players, and 2) PC players. For balance purposes, PC players and console players will not be mixed in the same pool for competitive matches.
Will competitive matches include players from other systems? Competitive players will be split into two pools depending on the system that you are playing on: 1) Console players, and 2) PC players. For balance purposes, PC players and console players will not be mixed in the same pool for competitive matches.
Can a console player (controller) group up with a PC player (mouse & keyboard) and play together? Yes, but only in non-Competitive game modes. Any group consisting of both PC and console players will be placed into the PC player matchmaking pool. Mouse & keyboard players will not be able to join the console player matchmaking pool, regardless of who is in their group.
How will cross-play impact the current (Season 28) Competitive Season? When cross-play goes live, there will be some time left in season 28. SR and leaderboards will be preserved when we patch and continue as normal for the rest of the season. Cross-play for competitive won’t be enabled until season 29 – meaning console players will only play with others of their specific platform for the remainder of season 28. When Season 29 goes live, players on different consoles will be able to group together to play ranked. Competitive Season 29 is scheduled to begin on July 1, 2021.
I’m a PC player who uses a controller. Can I play in the console matchmaking pool? No. PC players will play with other PC players regardless of their input method.
Will console aim-assist be enabled when I match up with a PC player? No. Console aim-assist will be disabled by default if you group up with a PC player to equalize play during the match.
Will aim-assist be enabled when I play in the console-only pool? Yes. Aim-assist is enabled for all console vs. console matchups.
I only want to match against players on the same console. Is that possible? Yes. Disabling cross-play features will ensure that you only match with other players on your same system who also have cross-play disabled.
Can I disable cross-play? Cross-Play will be automatically enabled by default for all users. If you decide that you want to opt-out of the cross-play function, you may do so through the Overwatch in-game menu, or within your console’s system settings for Xbox. PC players cannot opt out of cross-play.
Will disabling cross-play increase my queue times? Most likely, yes. We expect there to a be a smaller pool of players on each console who have opted out of cross-play.
Will cross-play be available for custom games? Yes, cross-play is enabled for custom games.
Is cross-play in Beta? Will there be more changes to this feature in the future? Yes, cross-play is currently in the beta phase. The Overwatch development team will be monitoring feedback and will look to make improvements on the feature moving forward.
 
Overwatch League
Where are my OWL tokens delivered? PC/Console? Both? OWL tokens purchased by players are delivered to the system on which the player makes their purchase. OWL tokens earned through the Overwatch League Viewership Rewards program are rewarded at the Battle.net account level and therefore delivered to all systems associated with the linked account.
*Excluding China, which will remain its own separate region.

You can now play Overwatch for free until January 4th, and even buy the game permanently for 25-50% off! There's also the Winter Wonderland event currently active until January 5th to check out as well, with new skins and activities to be had.

Today's PTR brings a lot of Hero tweaks and will be a pretty large download when it goes live, as it's a remaster. We're getting changes to D.Va, Orisa, Roadhog, Sigma, Winston, Baptiste, Lucio, Mercy, Moira, Doomfist, Sombra, Symmetra and Tracer, of varying significance.
PTR Patch September 24 (source)
ANNOUNCEMENT
Patch 1.41 is a remaster and will require a relatively large download for all platforms. HERO UPDATES
D.Va
Defense Matrix
Regeneration rate increased from 12.5% to 16% per second Delay before regeneration begins lowered from 1 second to 0.75 seconds Orisa
Protective Barrier
Cooldown increased from 9 to 10 seconds Roadhog
Scrap Gun
Ammunition increased from 5 to 6. Sigma
Kinetic Grasp
No longer blocks Chain Hook and Whip Shot Gravitic Flux
High gravity effect duration reduced from 1.2 to 0.9 seconds Experimental Barrier
Regeneration rate reduced from 175 to 150 per second Now has a 1 second cooldown after recalling the barrier Initial 0.2 second cast time removed Winston
Barrier Projector
Duration increased from 6 to 9 seconds Health increased from 600 to 700 Baptiste
Immortality Field
Health decreased from 250 to 200 Lucio
Crossfade
Speed boost’s effect increased from 20% to 25% Amp It Up
Speed boost’s amplification increased from 50% to 60% Wall Ride
Speed buff reduced from 40% to 30% Mercy
Valkyrie
The extra beams created by Valkyrie now ignore enemy barriers Moira
Biotic Grasp
Self-healing reduced from 30 to 20 health per second Doomfist
Rocket Punch
Time to reach max charge increased from 1 to 1.4 seconds The Best Defense…
Shield health gained per hit reduced from 35 to 30 Sombra
Translocator
Cooldown increased from 4 to 6 seconds Cooldown now begins immediately upon deploying the beacon or if it is killed by an enemy Symmetra
Photon Barrier
Duration reduced from 15 to 12 seconds Health reduced from 5000 to 4000 Sentry Turret
Damage per second reduced from 50 to 40 Photon Projector
Players impacted by the primary fire beam should now hear a louder impact sound Tracer
Pulse Pistols
Damage falloff now starts at 13 meters, up from 10 meters BUG FIXES
General
Fixed a player profile issue preventing hero win percentages from being displayed for competitive arcade mode seasons Heroes
Brigitte
Fixed a bug with Brigitte’s Rally checking line of sight from her feet instead of from her head Fixed a bug with Inspire’s position being affected by the player’s aim pitch Doomfist
Fixed a bug that allowed Doomfist to use Meteor Strike before taking impact damage from Sigma’s Gravitic Flux Sigma
Fixed a bug that allowed Sigma’s Gravitic Flux to ignore line of sight through some ceilings Sombra
Fixed a bug with EMP’s position being affected by player’s aim pitch Winston
Fixed a bug that caused Winston’s Barrier Projector to not consistently play its destroyed visual effects

Update: You can now also pre-order the game and get a free golden loot box, with a guaranteed legendary inside, as well as Widownmaker's Noire skin.

The Nintendo Switch will be receiving its second Blizzard game soon, as Overwatch will be arriving on the console on October 15th! It will come bundled with 15 skins and 3 months of Nintendo Switch Online membership, which is required to play the game.
October 15th will see the Heroes arrive to Nintendo's console.

We have more Sigma tuning in this edition of the PTR, with a whole lot of bug fixes for the new Hero as well as ones for Reinhardt, Sombra and Wrecking Ball.
PTR July 31 (source)
HERO UPDATES
Sigma
Kinetic Grasp
Can now be cancelled by Accretion. Experimental Barrier
Can now be recalled while Kinetic Grasp or Accretion are in use. BUG FIXES
General
Placement previews should now be much smoother (Reaper Shadowstep, Mei Ice Wall, etc). Placement previews will now hold their position after clicking, until they’ve been confirmed by the server. Fixed a bug where first person animations sometimes wouldn’t play when abilities were used immediately after being frozen. Fixed a bug where orientation toggles for placements could flicker at higher latencies (Ice Wall, Amplification Matrix, Photon Barrier). Workshop - ‘Set Max Health’ now functions as intended. Heroes
Reinhardt
Fixed a bug that caused charge knockback to be applied multiple times. Sigma
Accretion now correctly deals half damage to self. Accretion projectile no longer gets destroyed when impacting Symmetra turrets. Gravitic Flux can now move Pharah during Rocket Barrage. Fixed a bug where victims of Gravitic Flux could get stuck on slippery rooftops. Fixed a bug where Gravitic Flux would fail to work on Dropship doors. Fixed a bug that allowed Sigma to avoid an enemy’s Gravitic Flux effect by activating his ultimate. Fixed a bug that allowed Sigma to retain some of his movement ability when he was incapacitated (stunned, slept, etc) during his Gravitic Flux. Fixed a bug which caused Gravitic Flux to not be cancelled if you switch to another hero while it is active. Sombra
Fixed a bug where Sombra couldn’t gain ultimate charge for one second after EMP hack auras end on targets. Wrecking Ball
Fixed a bug that could cause Wrecking Ball to be temporarily stuck when using Piledriver on a slippery terrain.