There's a huge opening here if pervasive sensors ever become consistent, calibrated, and easy-to-use-properly enough that they can supplement in-clinic data streams with at-home ones. This would open up the research contribution opportunity to people who cannot participate in clinical trials today due to distance from trial sites---this is something like 99% of the people who might feasibly be interesting to a clinical trial.
The big step in clinical research is the PIII trial and these are almost universally held up in enrollment. If this stuff was pervasive and trusty enough to be used in even a fraction of trial therapeutic areas it would revolutionize research and medicine in those indications.
All that to suggest the opportunity. I'm not exactly bullish on Research Kit tbh though. The "if" in my first sentence still appears to be a ways out and the kind of "throw the kitchen sink at it and average everything out in post" analytics championed by big data/machine learning of today doesn't fly well with the FDA.
At least not yet.