Underlying a lot of these discussions is the assumption that there is a future where this is an actually useful, mass-market device. I'm still not convinced this is true.
For example, "killer apps/content" never arrived for 3D TVs and they have largely disappeared from the market. Same with various "waggling" input technologies like the Wiimote and Kinect. There were some compelling uses, like Wii Sports, but these were pretty limited and many other uses of these in games was a case of Nintendo shoehorning the technology into the game.
I think the best pessimist argument is the one offered by Folding Ideas in his metaverse video[1]: Text is really, really useful, and a virtual 3D space is not a good environment for either creating or consuming textual content.