Earlier quoted context omitted.
The goal of kernel mode anticheat is to prevent other kernel-mode modules from tampering with the game's memory. This can kind of be done on Windows, as there's a pretty short list of kernel binaries, and all device drivers are signed. This is out of the question on Linux, where there's probably 100,000 distro kernel binaries floating around, plus the ability to build your own with whatever modules you wish. The only…
We probably could run Linux distros under hypervisor (just like default Windows install those days runs not on bare metal, but under Hyper-V). And then games that wish for anticheat start a separate VM in hypervisor with complete secure boot chain of trust. Would require GPUs to support SR-IOV though.
Of course this all is based on the assumption that the local AI can do this fast enough with enough precision.