I don't think Apple would even want to try dethroning the Wintel crowd when it comes to gaming. Apple Silicon Macs just started and it'll be a while before a sizeable market emerges with enough Apple Silicon Macs volumes to entice game developers to develop/migrate titles to it. I think Apple is playing the long game here.
The existing 'gamers' entrenched in the Wintel world is unlikely to be swayed as there'e too many legacy games holding back this demographic, so it'll be foolish of Apple to try to convert them.
On the other hand, Apple has a growing customer base of school going children since 2010 that grew up with iPhones, iPads and iPod Touches. Some of these kids are going to colleges/universities and all of them need a notebook. This demographics are not held back by legacy games.
Apple need not buy any game studio(s) at all for any exclusive titles. Just let the market do it's job.
It'll be interesting to see how things develops in 3-5 years.