This is why I love google. They back engineering efforts wonderfully. Glass does look like a good wearable computing device.
But given 3+ hardware generations, it'd be useful to have a HUD with customized real-time data. Probably information overload for most people, but wearing googles beats checking a phone in your pocket for convenience.
Miniaturize this into a standard and stylish eyeglass format, integrate it seamlessly with the glass (or empty frames for those with good vision), sell it in a dozen different styles and designs, and it will fly.
That's surely where they're going with it. And it will be awesome and entirely socially acceptable.
This is the kind of thing you can see saying in the future, "Man, remember when we had to carry around those big phones with hard displays in our pockets? Crazy." They're moving forward on what could possibly be the next cell phone, and if they do it right (read: good human interface) then they might lead the market.
It's cooler than people are giving it credit for, I think.
Can't say I like the idea of glass in general. I'm going to be getting PRK surgery this year to finally ditch the glasses, hopefully this isn't a new fad of wearable devices. I know some family members that have been in the air force aren't huge fans of hud type technology as its too distracting.
Who knows maybe i'll be proven wrong.