Valve seems to be testing ARM64 and Android support on Steam, as per a new SteamDB leak. Popular titles like Left 4 Dead 2 and Garry's Mod are being tested with "proton-arm64" tags, among others. This could hint towards new future Valve hardware running on ARM64 architecture.
I like the sound of this for a device, but couldn’t it be more for these new ARM laptops?
Who knows, maybe we’ll see something like a Steam Engine processor by 2030, hah!