People use motion and heart rate trackers, Withing scales, and Beddit sleep trackers and receive data but little insight across devices.
There's clinical evidence that if you can drop resting heart rate, you will live longer.
If we had access to data from all these different devices, we could determine whether and to what extent any of these activities (walking, high intensity exercise, better sleep) is improving your resting heart rate.
Today, people manually have to figure out insights across devices themselves. In the future, each morning or each week, the devices themselves should tell you collectively what they discover about your health.
That future could be now if Validic and Human API opened up their APIs to N=1 customers like on this Quantified Self board.