Rootkits are dumb because the gaming industry is not trying with their anti-cheat software. It is so easy to cheat in these games even with a rootkit that it’s unbelievable.
Since the industry is moving this direction, I would like it far more if the OS just had a mode that essentially separated your normal OS from one used to play Esports titles. Put a wall between those operating modes, get rid of the desktop, and only boot the game and maybe a control panel.
The OS can then dump whatever it wants to the game without the game having control of my entire PC and file system. This seems like an obvious solution since it’s kind of the best of consoles without the worst of consoles.