A locked down system, possibly including remote attestation if things get real bad, is the only realistic solution aside from game streaming which removes the h

A locked down system, possibly including remote attestation if things get real bad, is the only realistic solution aside from game streaming which removes the hardware from the user's control altogether. The freedom afforded in personal computing by Windows and Linux is fundamentally mutually exclusive to the security that multiplayer game operators and proper players legitimately need. It's why game consoles and mobile gaming are the core gaming platforms. Note how Sony and Microsoft blacklist consoles suspected to be used by cheaters, and how games (and also banking) absolutely hate rooted smartphones because it breaks the assumption of a locked down and secured system.