Sony is literally telling you that they are going multiplatform. They are telling you that there are going to be no more AAA exclusives from PS Studios.
The writing has been on the wall for quite awhile slowly warming people to the idea
You both have this so wrong it hurts. That is not what Sony is saying. Believe it or not, there have been Sony games on platforms like PC since the '90s. Wipeout was ported to Saturn, N64 and PC after going on PS, but the caveat was Psygnosis being a publisher at the time they were acquired and having existing contracts to fulfill.
Saying there aren't going to be any AAA exclusives from PS Studios should really at least clarify what you mean by "exclusive". If that means games which will 100% stay locked on PS consoles forever, then that could be understandable. We could be at a point where by the end of this generation every 1P PS5 game has been ported to PC at some point in time.
But if you want to say that 1P Sony games will be coming Day 1 to PC, just stop for a minute and think about that. What sense would that make to do so for ALL of their 1P games off the bat? Why not just reserve that for the live-service titles, where if you're considering porting them to PC, makes sense to do Day 1 so the communities can start at the same level across both platforms? Even then, they might just limit that to Bungie's titles for the time being.
You need to slow your roll even further if you suddenly think this means a bucketload of more Sony games going to Xbox or Switch in the near future because again, logically, there's no reason to assume that. Why rush to that type of action, which could cripple their install base revenue on their own console (hardcore/core gaming fans deciding to buy the Sony games on PC/Xbox/Switch instead of PS and taking their 3P sales/MTX/DLC purchasing into other ecosystems outside of PS as well), when it is far more logical to be selective on that front? There's a reason why MLB The Show is on Xbox and Switch, even aside the MLB League's say. Sports games aren't seen as a representation of the marquee of PS's 1P brand, and on systems like Xbox, they sell very well. So there's little risk in bringing that to other consoles.
God of War or Xbox or Switch, OTOH? That could easily kill the prestige of Sony's marquee 1P software branding in terms of that bolstering the PlayStation brand, which could cause notable revenue drops to both 1P and 3P sales on PlayStation devices that could create a net loss situation for them in the long term, especially if they were to bring such games to other platforms and ecosystems where they have to give up a big chunk of the profit anyway to whoever owns that platform or storefront. So there's literally no logical reason to assume that is the most likely outcome of these statements, or the path they are ultimately trying to take.
At least, not without having some way to own the platform or storefront those titles go to. But even outside that, they have to consider how those types of moves affect 3P partners as well. If a 3P dev has a game where 70% of the audience is on PS, and 50% of that audience also buy heavily into Sony 1P...if Sony put those 1P on PC/Xbox/Switch Day 1 they lose a big chunk of people buying it on their console, and that 3P game suddenly sees 40% drop in sales on PS because 40% of that audience were also Sony 1P buyers now taking their purchases outside of PlayStation...what if that 3P game mainly sold so well on PS because it was in a vacuum on that platform and solidified itself within that vacuum? But the Sony players now buying that Sony game on PC or Xbox or Switch Day 1, have an option very similar to that 3P game causing them to buy that instead?
Can you see how Sony making such a move can also negatively impact 3P partners too? Temper your expectations when it comes to Sony 1P multiplatform support this gen, if you think it means PC Day 1 for all games, let alone Microsoft/Nintendo Day 1 for their games. They're most likely going to limit that to Bungie's games, MLB The Show and some of their GaaS live-service titles at most, and I don't expect ports of 1P games to PC to shorten much at all, or even all 1P games this gen to get ported to PC at all.
Nope. Only Bungie titles will release on Xbox. The rest will be either PS exclusive, mobile, PC, or all three.
Well, also MLB The Show will be on Xbox (and Switch). Depending on if certain publishers are acquired by Sony going forward a few more games could remain multiconsole as well, but that would depend on the publisher.
And in terms of live-service games I agree it'll mostly be Bungie in terms of console releases. The others will likely stay PS/PC (and maybe some mobile). I don't expect a single 1P single-player style AAA game to be Day 1 on PC or go to any other console, nor would that be the smartest thing for them to do business-wise. They'll likely never formally commit to a porting roadmap so don't expect all 1P PS5 games ported to PC, either. Some will get ported but I expect the window of porting will be 1-2 years at minimum, longer in some cases.
They'll exhaust all sales and revenue options for those games on PS consoles and services (using those games to boost subscription numbers) before finally bringing them to PC (again, if they go to PC. Depends on the game).