"in a couple of generations there was a solid chance that it would be easy sell for me and/or other people who don't VR/AR game but probably would use it for media/productivity."

Why in a couple of generations? You've put your finger on why the product failed: Apple's fear of connectivity. Apple zealously cripples the I/O on all of its mobile products, rendering them unusable for so many things.

All the Vision Pro needed was a video input. Gamers, 3-D modelers, drone pilots, filmmakers, engineers, travelers... all would have been a ready market for an excellent head-mounted video device. But nope... Apple can't have people doing anything with its products that it didn't think of.