I think the bigger problem with both is that they're tech demos rather than products. I got to demo Google Glass at a tech meetup once. It wasn't the first rel

I think the bigger problem with both is that they're tech demos rather than products. I got to demo Google Glass at a tech meetup once. It wasn't the first release, so there had been time to work bugs out. It rapidly overheated after taking, and looking at a couple pictures, and the battery life was abysmal. It demonstrated several capabilities that will probably be included in useful products in the future, but it was essentially unusable. I bet in a decade or so, smart glasses will take off. As soon as they're actually useful, the social resistance to them will get worn down.