He doesn't really explain why this will help healthcare. Ok, it has a better and more efficient motion sensor. And? Do joggers run with their iphones in their pockets? How accurate is that data going to be anyway if the phones jump around in your pocket? I'd expect something like a wrist band or watch would work better for that sort of thing. Plus, we already had some apps that tracked the distance you were making and so on.

If Apple is going to "revolutionize healthcare" this is not how they're going to do it. When I'm imagining "futuristic digital healthcare", I'm thinking of something a lot more all-encompassing than a motion sensor.