The video shows how easy it is to interact with Google+ but makes no mention of how it will interface with Facebook or Twitter or Pinterest or any other popular social media. Clearly, they are aiming at growing the Google's social circle (Duh!). In fact, further information on Project Glass is not yet available from a regular website, but from a Google + page: g.com/projectglass.
Of course this new technology raises lots of questions. Does it work in the dark. Do you really have to talk to it or can you nod your head to make it work (in either case your going to see some strange new behaviors). What if it is raining, snowing, freezing, windy, super hot? And, what about driving. The demo video is all pedestrian-based in New York City, but how does it perform as your negotiating a California Freeway. Will it even be legal behind the wheel? Will it be the new -- depending on your generation -- groovy, cool, awesome, rad, dope tech accessory or go the way of the eight-track tape?
We should know in a few months. According to the New York Times, Google sources say the "...glasses will go on sale to the public by the end of the year." And, they are expected “to cost around the price of current smartphones.” They are also working on incorporating the frames to work with prescription glasses, which should expand their marketability.