Actually, I think it will become inevitable. I know for certain patients they would welcome a centralized database of medical records. For example, my one relative has to see numerous doctors for different issues, and each prescribe different medications. Sure, the patient needs to inform each doctor of the medications prescribed but would be best if it was in 1 central spot. It also would offer a complete chronological order of medical history as opposed to separate records for each clinic the individual goes to. If Google really wants this to work they're really going to need "to do no evil", secure the patient database, and not scan/sell the details of the patient to advertisers.