If you imagine arbitrarily good technology VR still feels like a niche while it's easy to imagine lots of uses for a lightweight stylish internet-connected HUD that supplies realtime information--even if we're talking years in the future. I tend to believe this is one of the next consumer (and industrial) device categories but a long way to go as a wearable. (We'll presumably see it on a phone first.)
Google Glass was not arbitrarily good technology. And, while the glasshole thing may have been a factor in its demise, if you look around privacy factors don't much deter the use of anything people actually find useful.
You don't need to store video for AR to work. Besides, people take video and photos of others all the time and upload to the Internet without permission of the subject whether that's technically allowed or not in a given country.
