I don't see it taking off either, but Google keeps dropping more R & D into it and trying to hype it up. I can only assume its because they have more ways to monetize it as a product than just the initial price. That and when people start using it, google will have full access to all their search data, uploads, gps coordinates, etc.. and google has a big business in advertisement. The more google knows about a person to more custom the advertisements and share holders love seeing good profit margins.
As for me, I'm glad my work is off limits to the public. I wouldn't want someone trying to screw with me on the job and then post it on youtube. Its one thing to see someone pointing a phone at you or at others.. you know they're recording you.. but these things will almost always be recording or streaming. And I read where a different version can be mounted onto sunglasses or prescription lenses. I'm not all that interested in being in someone's video without my consent. Sure they show off the google glass video recording as a great way to record your experience skydiving or riding a roller coaster, but in reality the porn industry will be the biggest user.
The only people I'd like to see use something like this would be the Ghost Hunters. So many times they'd say: "Did you see that!?".. No.. we did not see that, because the cameras are pointed at you and not what you are looking at. Maybe if these guys had a camera looking in the same direction as their eyeballs they'd finally catch some good video footage.