Addressing few misconceptions:
1. They use a projector so the image appears a few meters away. You wouldn't be able to focus this close to your eye.
I don't understand this, there doesn't seem to be enough space for the image to appear a few meters away in quite a few of the exemples in the video. For instance, when the person is looking at his/her feet at the 0:06 mark?
It depends on how the display works, really. If you have to constantly strain to see the picture or if it uses a bright light or something like that, then yeah, I can see it being bad for your eyes. Mind you, I'm not an eye doctor, so I have no idea if there's some risk there that I don't know about.
However, I don't think a device that small would have enough current running through it to do any real damage to you in a short circuit unless someone invents Fallout-style microfusion cells between now and then. The most you'd ever be likely to get is a minor burn unless a faulty battery somehow leaked onto you, and that's a small risk with any electronic device.
Just saw your reply, sorry. Yeah, I agree these glasses are probably not that dangerous. My own personal "phobia" is to go blind, so I'm suspicious/afraid of anything close to my eyes (except my own glasses).
