I tried Glass a month or so ago, it was wholly underwhelming and I still couldn't think of a good reason to ever wear that thing. And most people will never wear Glass, because there is no killer-app to convince a large audience to ever buy it. VR already has a killer app, which is gaming. The Oculus launches with 30 games, including a Valve VR game/demo. More and more free game engines are supporting VR (e.g. Crytek V). Bullet Train looks amazing, I've heard that Tilt Brush is great too. Can't wait to see what creative developers do with the tech. I think that as soon as the price drops below $400, it'll take off. That's in the ballpark of good monitors, which VR sort of is anyway.
Except that games are in your palm, son. The big growth in games is in casual, freemium, skill-free non-immersive experiences. The killer app for VR gaming was Descent, which is damn near older than you, and nobody cared. Biggest non-mobile gaming story of the past 15 years? Guitar Hero and Rock Band. Why? Because you play with your friends. Because it's a mutual experience. Most non-mutual experience you can find in gaming? VR. Same as it ever was.
Historically, VR has more to do with psychedelics than with gaming. Not a thing that gets emphasized, because nerdy psychonauts are a small market and not appealing to the NSF, but Timothy Leary didn't spend all that time at VPL Research because he was really into Frogger.