Since we're on the subject --
What do you do with height/stairs/climbing data?
I've had a Garmin watch for a few years, and it's been sort of interesting to see the GPS-based altitude changes, mainly during my bike workouts.
It would also be useful for someone like my sister. She gathers plant specimens across the wilderness, and logging every piece of location data, including altitude, is part of the research.
On a daily-wear device, though, I'm not sure what I'd do with it.