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During the webcast, I was struck by two things:
Glass definitely does a few neat things, but you can already do them (hands-free, even) with your smartphone. I mean, I bet it is really cool to get directions from your eyeglasses, but it doesn't seem like the sort of thing that will change my life. My phone does a great job of that, already.
It seems to me that if the main feature of a thing is its newness, then you've got a problem. It won't be new forever.
If you watch that webcast, see if you can detect any other amazing current features. Mostly, the "Glass Explorers" (yes, they really refer to themselves as "Explorers") talked about how it could be awesome in the future, not how it is awesome. Turn-by-turn directions and hands-free text messaging aren't transformative just because they are in your eye. Most of the things that could make Glass awesome haven't been invented for it, yet, though. If you think of it as a platform, though, instead of a product, it starts to look a lot more interesting. Listen to the apps the developer Mitch was interviewing is working on, and you'll get the idea.
But I still don't think I would want to go around in public with it on.