It doesn't really seem that revolutionary: just a secure database for storing medical and personal data that gives the user fine-grained control over what data is accessible to the app.
However, I expect that there are going to be apps and products made to target it. I was talking with a friend in the weekend who works in the health industry and they are looking seriously at it.
Apple seems like the sort of company that you might trust to store this sort of data. Could anyone but Apple pull something like this off?