The general consensus in that thread is that, while the Vision Pro can play “flat” porn videos on sites like PornHub, there is currently not an easy way to play 180 degree side-by-side videos on the Vision Pro, which is how most commercial VR porn is filmed.
Budget issue I think, it’s really not affordable to purchase both a VR headset and a receptacle that’s more complex than a fleshlight on a sawhorse.
Oldtimers will remember…
http://www.easylife.org/fufme/index.html
Edit - for the interested, the name was a riff on this: https://en.wikipedia.org/wiki/CU-SeeMe