Google Glass hardware still not locked down
IEEE Spectrum: How will people interact with Google Glass?
Babak Parviz: Right now, we have a touch pad on the device that allows people to change things on the device if they wish to do so. We have also experimented a lot with using voice commands. We have full audio in and audio out, which is a nice, natural way of interacting with something that you’d wear and always have with you. We have also experimented with some head gestures.
Amusingly, Parviz later notes that Google has no plans for advertising on Glass “at the moment.”
Relatedly, RoadToVR.com spotted the above man wearing a very conspicuous Glass prototype in New York late last month.