The Vision Pro is the best example of video passthrough and hand/eye tracking that has ever been produced, but they're also insufficient for it to be a seamless experience.
This isn't really the problem, I think. MKBHD touched on this but this system doesn't seem to have a killer app. There's a bunch of stuff you can do with it, but which of those things can be done better than just using a computer?
Gaming is the big one but apple doesn't care about that so what else is there? It would be good for virtual walkthroughs of a home you're considering buying. Or at an architects office to show off the experience of a new building. But...cheaper VR headsets can already do all of that.
So what actually task can this do better than anything else?