If Sony buys a big pub there will almost be nothing left. Whats left now with Zenimax and atciblizz gone? Ubisoft, EA, Take Two, is Warner Brothers a thing? Some diminished Japanese pubs, Capcom/Square Enix?
I guess it would be the ultimate in consolidation if the big 2-3 platform holders essentially also hold all the development.
Anyways I'm not convinced buying big pubs is much of a good idea because I'd say that outsize exclusive hype aside, ALL the most popular games in the world tend to be multiplatform. I think this is precisely BECAUSE they are multiplatform. Of course I'm sure twitch is not a proxy for game sales or lucrativeness (word?), but the top viewed games on twitch right this very second are in order League of Legends (PC) Pokemon Legends (I dont actually know, Switch?) GTA V, Slots (...), Valorant, Escape From Tarkov, Apex Legends, Hearthstone, Dota 2, Fortnight, Warzone, Fifa 22, World of Warcraft, CS Go, Dead by Daylight, Minecraft, the list can go on for a long time but it's almost all PC/Mobile (which I consider kind of the world's open platform, since most of these games can be played on very low spec PC's in emerging markets), or multiplatform PC/Xbox/PS/maybe mobile/maybe switch at worst. I guess if you buy the pub intending to remain multiplat it's one thing, but that's kind of changing the terms of historical accepted ideas.