But the feature everyone is going to go crazy with — and the feature you probably most want to use — is Glass’ ability to take photos and video with a "you are there" view. I won’t lie, it’s amazingly powerful (and more than a little scary) to be able to just start recording video or snapping pictures with a couple of flicks of your finger or simple voice commands.

At one point during my time with Glass, we all went out to navigate to a nearby Starbucks — the camera crew I’d brought with me came along. As soon as we got inside however, the employees at Starbucks asked us to stop filming. Sure, no problem. But I kept the Glass’ video recorder going, all the way through my order and getting my coffee. Yes, you can see a light in the prism when the device is recording, but I got the impression that most people had no idea what they were looking at. The cashier seemed to be on the verge of asking me what I was wearing on my face, but the question never came. He certainly never asked me to stop filming.

But the feature everyone is going to go crazy with is Glass’ ability to take photos and video with a "you are there" view

Once those Explorer editions are out in the world, you can expect a slew of use (and misuse) in this department. Maybe misuse is the wrong word here. Steve tells me that part of the Explorer program is to find out how people want to (and will) use Glass. "It’s really important," he says, "what we’re trying to do is expand the community that we have for Glass users. Currently it’s just our team and a few other Google people testing it. We want to expand that to people outside of Google. We think it’s really important, actually, for the development of Glass because it’s such a new product and it’s not just a piece of software. We want to learn from people how it’s going to fit into their lifestyle." He gets the point. "It’s a very intimate device. We’d like to better understand how other people are going to use it. We think they’ll have a great opportunity to influence and shape the opportunity of Glass by not only giving us feedback on the product, but by helping us develop social norms as well."

I ask if it’s their attempt to define "Glass etiquette." Will there be the Glass version of Twitter’s RT? "That’s what the Explorer program is about," Steve says. But that’s not going to answer questions about what’s right and wrong to do with a camera that doesn’t need to be held up to take a photo, and often won’t even be noticed by its owner’s subjects. Will people get comfortable with that? Are they supposed to?

The privacy issue is going to be a big hurdle for Google with Glass. Almost as big as the hurdle it has to jump over to convince normal people to wear something as alien and unfashionable as Glass seems right now.