I think most people are trying to find better value in the product.
Headsets focused on providing a screen already exists, NReal is a decently selling product. Sure the Vision Pro has way better resolution, but we're also assuming that NReal and co will have better resolution in their next iterations.
To jest, if a VR screen dedicated device comes to market in 2024 with a tad lower resolution than the Vision Pro at half or a third of the price, will the Vision Pro still have a market as a virtual screen ? At that point it will need to justify the price with all the other things, the hand tracking, the surroundings integration etc. All the stuff people are trying to find value in outside of it being a screen.