Developers will be required to disclose if their game uses kernel anti-cheat. This applies to both new games and existing games. Non-kernel anti-cheat is encouraged to be disclosed as well, but it’s only mandatory for developers to declare if they’re using kernel anti-cheat for the time being.
It’s worth mentioning that many games use kernel anti-cheat on windows, but only use user space anti-cheat on Steam Deck and Linux.
The thing I think is left out is that it usually eliminates all of the casual cheaters. For many games this is a massive change in the feel and culture of the online space in the game.
But yeah, no matter what, even when the games are never on our hardware and become just video streams sold to us by the hour, cheating tools will always exist. Even if it’s just a bit of tape on your monitor.