A few years ago, Phil Spencer was quoted in an
interview as saying the following: "You'll have things like The Legend of Zelda: Breath of the Wild or Horizon Zero Dawn that'll come out, and they'll do really well, but they don't have the same impact that they used to have because the big service-based games are capturing such a large amount of the audience. Sony's first-party studios do a lot of these games, and they're good at them, but outside of that, it's difficult–they've become more rare…It's a difficult business decision for those teams, you're fighting into more headwind."
As I said before earlier in another post on
Microsoft's ultimate aim beyond gaming, the industry from a business perspective has changed dramatically over the last decade. First-party games like Horizon, Last of Us and God of War may be the face of the PlayStation brand, but the most important IPs to Sony remains Fortnite, FIFA and Call of Duty; service-based games that draw in billions of additional digital revenue yearly.
You could argue therefore that while these studio acquisitions by Sony are there to support pre-existing IP (as support studios), and give their talented teams the flexibility to develop new IP, its difficult to judge their importance to the PlayStation business seeing as that Sony need an online-multiplayer IP to secure revenue. They have tried and failed so far (MAG, Killzone, Destruction All Stars).