It looks like Valve is working on bringing the Steam Deck's "special sauce" for Windows games on Linux to Snapdragon and other ARM devices.

Valve are likely up to something hardware-related again, report NotebookCheck. Their next chunk of plastic and wires – following the Valve Index, Steam Deck and Steam Deck OLED – could swap PC gaming’s favoured x86 architecture for ARM, the type of processor favoured by the Nintendo Switch, Macs, and mobile phones.

Valve is working on an ARM64 implementation to bring x86-based Steam titles to mobile devices — including its rumored standalone VR headset

Proton is Valve's solution for running many Windows games seamlessly on the Linux-based SteamOS. The leaked code shows Valve testing this ARM64 version with a wide

Valve may be developing an ARM64 version of Proton for Linux gaming. Hundreds of games, like Left 4 Dead, have been tested for compatibility using a new 64-bit layer. The potential for ARM64-based portable consoles opens exciting new possibilities.