TL;DR: Valve launched the Steam Frame VR headset with an Arm-based Snapdragon chip, aiming to run Half-Life: Alyx natively and streamed from PC. The new hardware features a “Frame Verified” status for optimized games, while rumors suggest two upcoming Half-Life titles supporting PC and VR cooperative play.
If it’s like anything else running in WSL, absolutely as slow as balls. Most Linux apps are written with the assumption that filesystem operations are incredibly fast, whereas that’s not true with Windows. Most games open one big file and do big reads from it so it’s not such a problem, whereas something like Git assumes that touching tens of thousands of files should be basically instant.