Google's Sameer Samat gives a very simple example of how this service could help:
Just a few years ago, my father suffered a minor heart attack and was sent to the ER. I arrived on the scene in a panic, and was asked what medications he was taking. To my surprise, I had no clue. If my father had a Google Health account, and had shared his profile with me, I would have been up-to-date on his current medications [Sameer Samat, "Google Health: Helping You Better Coordinate Your Care," The Official Google Blog, 2009.03.04].
Those of you who believe in reforming health care through personal responsibility rather than government programs, well, here's your chance. Get your data on Google Health!