Apple have not been shy about implying they think it'll be "really big" and have an impact on the actual healthcare system.
This author is pointing the myriad of actual reasons why "your personal medical data" is stunningly uninteresting to healthcare providers and not at all a simple problem to solve.
I can't believe you're getting downvoted for this. Apple is the one playing at having a "solution" to this problem, and they have been from the moment they showed Epic MyChart in the keynote.
The reality is that HealthKit is going to be a victim of Apple's inability to play nicely with others, in addition to its other technical limitations also described in the post. However, Apple has positioned it so that when it does flop, they can play off as the big bad medical industry refusing to embrace change.
Yes, and this time there is no Steve Jobs to drive a hard bargain.
EDIT: This is not snark. It's an observation. Recall last time with iTunes Steve Jobs managed to get all the music industry players on board even though the deal wasn't in their favor. I doubt Apple will be able to achieve the same in the health industry without Steve Jobs at the helm.
The only "playing nice" that needs to happen is that Apple needs to keep the HealthKit API around. If an EHR company has an iOS app, they use the HealthKit APIs and they're off to the races.
This author is pointing the myriad of actual reasons why "your personal medical data" is stunningly uninteresting to healthcare providers and not at all a simple problem to solve.