I can only imagine the cool riding and running videos I could shoot with this. The pictures of my runs I could take (without having to stop and take out the phone).
Doing a ride that you have pre-mapped out and easily following the map. Competing with your buddies on a ride. Tracking other athletes during races (if USAT will allow it). Tracking your friends at a running or triathlon event so you can easily track them and be at the finish line when they arrive (or they be there for you).
The possiblities are endless.
What ways can you think of to use Google Glass?
Google Glass Video 1
Google Glass Video 2