Precisely.
what will you really be able to do with Google Glass, beyond having information presented before your eyes?
Isn't that kind of a description of Google search?
I don't think a product has to have fancy use cases for it to be viable. Often the simplest is the best. Sure smart phones have millions of interesting apps, but what do you use yours for 90% of the time? If you're like me, it's looking stuff up on the web and communicating with people.
Google's approach to search has been heading in this direction for a while now. First it was a traditional search engine, then offering predictions and suggestions, then search-as-you-type, and now, with Google Now, its essentially search results before you even have to ask for them.
As I see it, Google Glass is primarily a display for Google Now. It brings you from pulling your phone out, unlocking, opening Google Now and seeing it's results, to seeing results as soon as you gesture your head.
It's still just search results (from your calendar/diary/history as well as the web) just quicker than ever before.