Google Glass seems like a different idea. A few things came to my mind. How would the sun or rain affect the glasses? Specifically, the brightness, temperature, and moisture. Furthermore, what about product liability? Moreover, will drivers be allowed to wear Google Glass? Wouldn't Google Glass be a distraction? Finally, $1500 is too much for a toy.
All I can say is take some profits. Better to be safe than sorry.
For the record, I currently have zero positions in GOOG.