I don't give much of a hoot about Google Glass. I'd like to see the same functionality in a smartphone.

With "Creepy" being the operative word. Just like turn by turn navigation makes you NOT know where you are, this technology makes you notice LESS of what really matters.
I dislike it when people that look at their phone all the time when socializing. Those goggles makes it worse. Even in the video you can see how the actor actually fails to notice things as he's too absorbed by facts dished up to him.
Half the fun on a trip is discovering things rather then being told. Yes, you might miss half the facts but instead you have your eyes out there and your heart and soul into the experience and the people around you.
I was in town the other day and noticed how half the people on the side walk had their smart phone in their hands looking at the thing. On a square sitting enjoying the sun, still staring at their screens. That is depressing enough.

I think this can be useful for some situations, but if overused, I can't help feeling that this will limit your experience of the environment somewhat. As a videographer I often film dance and theatre performances and I know that even though I am there and seeing the performance, experiencing it through through the lens is not the same as being an audience member, and I lose out on a lot of the overall visual and emotional experience of the art form because my focus is through the lens. I've also noticed when I'm travelling that I have to be careful not to get too involved with my camera, and let myself experience it through my own eyes and other senses, else I end up with lots of great photos, but not much of a sense of what it was like to be there.

For this sort of use, count me out.
However...
...in a technical field? I'm all in! I'd love to download an app that gives me all the details on how to work on my car for example Just pop the hood and it recognises what's where and what I need to do to fix a particular thing, lists of tools required, etc.
I think it could also be useful from a medical point of view with a cut down/streamlined version for use in surgery or in the military.
Flame away as I'm not that up on what these things are capable of. Always willing to learn though...

I love the "sci-fi" nature of it but can't help but be a little negative about it. Instead of enjoying the moment, looking at the beauty of nature and your date you are seeing pictures that other people have taken? It is like the people at concerts watching the show through their mobile phone as they try to record them. Don't we want to engage in our environment?

I once read the line (from some clever AC-loving urban celebrity) , " The 'great outdoors' is the space between your apartment door and the taxi."
Today, the "environment" is the space you engage by taking pictures with your moblie telephone.

This kind of technology has a lot to offer for military use but as others have noted, and as we have all seen many users are enveloped by the screen in front of them. In a tactical setting paying so much attention to viewing, gathering, and sharing info might seem useful but can leave plenty of time to put cross hairs on you. A distracted soldier can easily become a pop-up target for the opposition.

I suppose this could work in certain cases for me as I already wear glasses . BUT , I think it would cause a huge disconnect between you "me" and your "my" environment most of the time . You're looking even more traffic accidents and people walking in front of moving equipment . Over all it's going to be for mentally lazy people who can't be bothered to think or plan ahead .

too distracting. NEXT....

If this sells, what's to stop them from writing an app that accesses the Kama Sutra? BodyTrip.