Valve plans to use Steam's pre-caching system to deliver translated game code to Arm devices before the first launch. Valve engineer Pierre-Loup Griffais described the plan in an interview with PCWorld. It would build on the work that lets Steam Frame run Windows games made for x86 PCs.

FEX translates the game's x86 CPU instructions to Arm. Translating a new block of code during play can cause a hitch even if the game runs well otherwise. FEX can already save translations to disk and reuse them on later runs. Valve's plan would make some of that code available in advance, similar to how Steam distributes shader caches.

Valve gave no release date or performance figures for Steam integration.

Sources: Valve interview | FEX release notes | Steam Frame