I believe you can already get phone apps that will identify trees and bugs so I don't see any reason why that couldn't be ported to glass.

Similarly, even the demo video shows driving directions and both Google and others provide hiking trail, cycling directions (even offline ones, which you might need in such circumstances).

Personally, I'm interested because I'm a cyclist. I think they'll be in the front lines with anyone else who needs their hands free once the price comes down.