In my experience, practically nobody. I agree that the Vision Pro is a technological marvel, but it's still a solution looking for a problem, and it's striking to me how even Apple had a difficult time presenting actually compelling use cases in their videos.
To be clear, I think there are some viable uses: gaming obviously, and potentially media consumption, but even there this solution is so much worse than a home theater system (as another commenter mentioned, I can get a group of people together in my house to all watch a movie on a big screen TV that costs much less than the headset that each of my friends would also have to own).