[therein]

Anti-cheats are already remote attestation in theory for online games and they are unable to protect the process perfectly. They are unable to detect alterations to the process memory and be correct in their attestation at all times.

And cheating isn't a significant problem in in-browser games, it's not like anyone modified the browser source to create cheats for in-browser games. And for competitive online games, we have a great imperfect attempt at showing what remote attestation would look like. Anti cheat in games.

We have AAA titles that work flawlessly under Proton but you can't play them on Linux because anti-cheat needs to do DKOM on your Windows kernel before it lets you play.

I agree with the rest of your post though.