At one point, I needed to know whether ground mustard is the same as mustard seed. I searched for it on Glass, but I got paragraph-length “answers” that didn't answer my question. Because of Glass's tiny screen, many of the long-winded results included only introductions, or the questions themselves.
I gave up. Mustard is mustard.
Nonetheless, cooking is one of those intuitive, simple uses for Google Glass that makes a lot of sense.
It also implies a whole slew of other possible uses for times when you need both hands for an activity.