I personally don’t think Glass in its current form would ever get the penetration even of bluetooth headsets. I’m far from convinced that Google themselves are determined to make it a reality (I mean, all these products are window dressing for their real business). But as a research project, it makes a lot of sense and shows promise.
Looking at that video above, just the Glass display floating in space and working with voice commands, you can see how it works an investigation of how to make a postage-stamp-sized interface to the internet. It happens to be mounted on a headset, but the real application may be when it’s embedded in a watch or an elevator or a car HUD or something else that hasn’t occurred to me.
It’s speculation both ways. Many people’s informed assumption is that this will have uncomfortable social consequences; you’re only guessing that those concerns will prove unimportant.
Sometimes people do raise spurious objections to something purely because it’s new and unfamiliar, but this isn’t one of those cases. Most people are already uncomfortable having cameras pointed at them, whether or not they’re the obvious subject. Some people already don’t like talking to someone wearing sunglasses, especially in peripheral social interactions. Some people find it rude if you talk to them with your phone in hand, even if you’re looking up from the screen at that precise moment.
More to the point, almost everyone finds it extremely rude when a sales assistant interrupts a physical customer to deal with someone on the phone— and that happens all the time— and we’ve had a century to figure out the telephone. There’s no question that Glass will bother people; the question is how or if that can ever be ameliorated.
The horse meat “issue” didn’t affect fast food restaurants because they have their own supply chains for meat. In fact, they have more control over where their food comes from than most “field to fork” restaurants.