Not great as a product no, but in concept yes. I personally haven't seen anything like this, and I just think a much better job could be done. I agree you could

Not great as a product no, but in concept yes. I personally haven't seen anything like this, and I just think a much better job could be done. I agree you could just use your phone if you were able to update GPS coordinates via your phone, but then you have to keep out your phone to know which way to go instead of just looking down at your feet. Off topic, I think something like Google Goggles GPS would be far more interesting.