Block chain and its uses cases for a non-financial asset market
It's far from obvious that any such system would be usable or secure. But in many places "blockchain" has become a alternative way of saying "cryptography", "digital signatures", or "distributed system" -- all of which might be useful.

Storing patient data "in a blockchain" is one of the more horrifying concepts that I've encountered. I've never seen a good reason for it and in fact there seems to be a perfect mismatch in the technology:  What Bitcoin invented was a way of building a public system of a sort that was previously trivial to build privately.  There are many issues with medical records, making them less private is not generally considered one of them. :)

To me a lot of the blockchain hype feels like "Bitcoin appears to solve a complex problem.  Peace in the middle east is a complex problem, thus the technology from Bitcoin can solve it!".