When you say health, all I can think of is a fitbit for older folks. I wonder if a small device like that could collect enough different kinds of data to be useful to doctors.
Healthcare spending in the US is something like 15% of GDP. It's a trillion dollar industry. Think health insurance, pharmaceuticals, nursing, dentistry etc.
Revised Idea: A fitbit-like device could be distributed by health insurers just like Progressive's "Snapshot" program. It would discern which patients led healthier lives, and give them discounts.
You mean "give everyone else shittier prices"
Given that someone was looking at getting medically relevant data out of patterns in the amount of time it takes people to answer the phone, I expect there would be plenty of useful information there. The problem is making the relevant information accessible and understandable.