It's not a Linux Vision Pro. Vision Pro is aimed at productivity and "Spatial Computing" or whatever.
This is a gaming device first and foremost, and you can see that from the black and white passthrough on the Valve machine.
But you're right that it can definitely be the foundation for AR/VR forward Linux environments. It would be really cool to see a 100% spatial compositor that challenges the conventional flat computing paradigm.
But playing with full color passthrough and hand tracking on Quest 3 does make me a little disappointed in this. I was able to sideload standard Android APKs and interact and move them around with my hands which was mega cool. I could do the dishes with YouTube just floating in front of the sink. I didn't actually do it more than once but it got me excited about the future of spatial computing.