I finally got a chance to play with a pair of Google Glass, and I recorded my thoughts in the video above. Here are some key points:

They are a great step forward in mobile hardware and software
The interaction of using them without having to use your hands is very innovative
The interface is easy to see and easy to use, so much so that when I let my daughters put them on they were able to catch on (ages 6 and 8).
Integrating Google Glass and other devices, tablets, phones (maybe), smartwatches, internet tvs and so on, will make the lines between offline and online always integrated.