Dr/Patient analysis of data from wearable device sensors improves outpatient health for the better without the qualitative notion of "how do you feel".
What is in the way is price and performance of the sensors in these wearable devices to soon reach ubiquitous equilibrium. What's more, health data warehouses like Apple Health, Samsung Sammi and Google fit will hopefully begin adopting common standards and open up their ecosystem for patients and quantified fitness types to gain the flexibility of persisting their data across different "health banks".
This will help us all leverage the strengths of the different platforms, help us better predict and better inform us on our health behaviors.