It has, i used it to bike to work. It works pretty great, especially with headphones.
I think he means navigation with public transit directions, NYC subways and that stuff.
Edit: From the Arstechnicha review:
You can answer a phone call and there's a special UI, but neither Wear device has a speaker, so you can't hear anything. It will answer with the phone in your pocket.
This seems kind of nuts. I mean, okay, it's not going to be an ideal way to take a call, but for the target market (people too busy to pull their phone out) it seems like a big omission. I guess they just assume the people who'd want this kind of functionality have a bluetooth headset?