Tim O'Reilly on Google Glass
A couple of comments:
1. People have this notion that it’s privacy-invading. It really isn’t. It’s pretty easy for people you’re interacting with to see when the device is on - the lit-up screen is viewable from the other side. Yes, you can quickly take a photo or video, but only with either a voice command, or a push of a button on the frame, so it’s clearly noticeable.
2. People also have the notion that you won’t be able to tell when someone is talking to you and when they are on the device. Again, that’s just not true. It sits above your eyes and it’s very clear when someone is looking up at the screen rather than looking at you.
3. Speech is the natural interface for this device, but there are also a lot of gestures on the frame that control it. It’s elegant and intuitive. But some of the magic is the immediacy of talking to it, or touching it, and having something happen.