Google glass wasnt an AR headset just a pair of glasses with a heads up display attached at the upper corner of the right eyepiece. I see what your saying as far as the failures but even 10 years ago we were not close to the tech we have now to make an actual usable product like the one I linked above.

I honestly disagree when it comes to AR. People are hooked to their phones 24/7. Imagine not needing to touch your device at all but it's just there in your view the instant you want it.

Take a look at this