It still sucks for gaming, those are Windows games running on Proton, not much different from running arcade games with MAME, Amiga games with WinUAE,...
I think it is different. As someone joked, "thanks to Wine, Win32 is the 'stable Linux ABI'" -- translating system calls is a lot different than emulating hardware, and the results prove it
And with the R&D that went into the Steam Frame, the difference between x64 and arm64 is becoming negligible. You can target x64 Windows and can reasonably expect it to run on Android via Winlator.
