I'm not sure its perfection they are looking for. I saw a show (I think 60 minutes) where someone was talking about the smart phone being the next health monitor. Rather than when you get a physical which is just a snap shot in time it paints a much clearer portrait of your health when something is consistently monitored (sugar, cholesterol, lipids etc).
I think people will pay much closer attention to their habits with such a technology. This product could be a mass appeal thing for those (healthy or not) interested in monitoring their health. IMHO, I give it 2 years before we see this technology in a smart phone...whether it's PODD's or not is another story.