Elden Ring runs better on Linux thanks to Valve pre-caching shaders on first launch, while Windows users have to suffer through stuttering and poor DX12 performance. Pretty wild!
It also has Proton-specific fixes that help performance, such as https://github.com/HansKristian-Work/vkd3d-proton/commit/54fbadcc9405841cc018210ba6d1045e71f405c0 . Thanks, Valve!
Yes very soon one will be able to run windows apps better on Linux than on windows. Already the case with a lot of old apps and games.