A developer proves you can stream SteamVR to Vision Pro
A developer named Zhuowei Zhang has ported the PC VR streaming program ALVR to Vision Pro. ALVR is an open-source alternative to Air Link, Steam Link, and Virtual Desktop.
With ALVR for Vision Pro, SteamVR content can be streamed from a PC to Apple's headset, as another developer demonstrated in a short video. However, this is unlikely to be much fun, as most SteamVR games require VR controllers, which Vision Pro does not support.