At least that's how I interpret what they are doing.
It has amazed me for 10+ years that of all the things I *can* do online, aggregated medical history is something that isn't done yet and isn't done in the name of confidentiality. I don't hear confidentialty when TransUnion, Equifax, and someone else collect my financial information, aggregate it, and score it, so why shouldn't my doctor here in Snoqualmie have access to my records of my doctor in Michigan City, my doctors in Chicago, and my hospital visits in Michigan?
If this indeed is what Google is doing, kudos to them for doing it. About time someone did it!