> I'm not saying you're wrong.. but I feel this argument is getting a little bit old in an era where we're being filmed everywhere by everything from subway cameras to iPhones.
That's a fair point but personally I still feel there are some important differences. CCTV footage is usually used (ostensibly) for security or logistical purposes (e.g. traffic management) and comparatively rarely ends up on YouTube or Facebook. Glass footage on the other hand is acquired by a private individual with less visible motives and no oversight. That's not to say that CCTV footage is never abused or personal footage usually is, but on balance I would expect more people to be concerned about being recorded by a random stranger than by a random shop.
Secondly, the 'almost covert' nature of Glass makes it feel to me inherently creepier - you can see if someone is pointing a phone or standalone video camera at you, but if someone looks your way wearing Glass, are they recording you? I expect many people (particularly women, given some of the websites out there) would feel nervous about that. It's easier to consent to being recorded when you know its happening, and therefore also easier to prevent it if you don't consent.
I expect that a person holding a phone in front of them everywhere they went as if filming would experience a similar level of hostility to that reported by some Glass users.