I'm very excited about wearables in the near future, but they are currently a curious case of public attention outpacing the technology. "Sleep trackers" are a joke, current pedometers aren't very accurate, and basic things like heart rate and blood pressure monitors are still a ways off from solid implementation.
At least this will have open APIs. I had a fitbit until I found out they don't let you easily get YOUR OWN DATA off the thing. The healthcare insights derived from better wearables, at scale, are going to be huge.