Wow, I haven't encountered such an obvious technological fad since 3D TV was a thing, and I'm quite sure the "3D web" such as it is will meet the same fate. It has all the same markers too:

- a stalling industry desperately looking for a new revenue stream: check

- heavily locked down content tied to expensive hardware: check

- aggressively pushing an unwanted product that doesn't do anything anyone really needs: check