I felt like this when Google Glass was announced - but these days smartphone cameras are so ubiquitous and people constantly photograph/video others, I'm not sure this actually makes much of a difference. If someone wants to video you surreptitiously, they'll do it with their high quality phone camera and you won't notice.
Yeah there are so many ways to carry a camera these days, I'm not going to get fussed about one more -- even if I have no personal interest in this thing whatsoever. It's more about how people behave with their pictures and videos than it is about what tech they use to take them. Actually, these would be great on everyone else's head at concerts, I won't have to try to see past the phones they're holding up the entire time.
