I think there is an actual use case for these things, but we are far from them being practical in any way, shape, or form.

The real use I see is for entertainment, specifically in public places. The ability to turn on a TV show or movie anywhere, anytime, while no one can see what you're watching is a significant thing. In the right circumstances, that point alone will sell millions.

This video highlights just how goofy people look and act while using them. Texting and other motions are hilarious to watch from an outside perspective. If Apple can introduce forms of tactile interaction, I can see that possibly catching on—I'm sure as hell not going to single-finger type something in the air, but if I can type on a table in front of me? Maybe.

And really, people won't be caught dead wearing anything as conspicuous as these out in public. I'm honestly convinced we're still much further out than 10 years from VR being seamlessly integrated. These won't catch on until they're inconspicuous, and I feel like that'll take some pretty massive technology leaps.