I used Google Glass in person for about 10 minutes, and after so much oh-ing and awing over the tech, for me it was pretty disappointing to experience. It felt like I was using a cheap Android system from 2012 overlayed onto reality and, uh, it wasn't that great. That being said, I only got to see a few basic apps in action, and maybe I didn't get the full tour of the hardware's abilities.

Personally, I think that VR will win out, even for AR applications (or maybe my semantics are incorrect). I can imagine a VR system that uses external cameras to mimic a person's natural field of view and overlays additional information in the process of displaying it. It seems like a more available route to a fully immersive "augmented reality" than the current glasses based prototypes.