Playtron are quietly building up their Linux-based PlaytronOS behind the scenes, and not only have they released their first Alpha but they've pulled in another investor too.
Here is the quote I paraphrased in my comment (I’m sure I got something wrong):
The immutable file system from Fedora Silverblue will be very helpful in implementing our anti cheat system but it is not our anti cheat system. We are planning to generate signatures for each version of our OS (easy with Silverblue) as well as all the DLLs we install dynamically. Basically using our SDK, a game developer will be able to obtain a signature of the current config on the device then call our backend to verify that this is a genuine Playtron version.
Here is the quote I paraphrased in my comment (I’m sure I got something wrong):
https://www.theverge.com/2024/3/19/24106356/playtron-explains-how-immutable-file-systems-are-not-but-could-help-with-linux-anti-cheat