re: Google Glass essentially flopped...

Google is a black swan factory, they've always had more flops than successes because they're always swinging for the fences. It seems like the biggest negative to Glass was the reaction of other people to Glass users. Seems like the world isn't ready to be on camera 24/7 and potentially be the next funny meme or layman version of the celebrity crotch shot, so I think any similar tech is doomed to fail until we break down more barriers to expectations of privacy, which we sadly are in the middle of doing.