How about personal genome sequencing for $399?
That's actually part of my first idea. Still, the thing with your personal genome sequencing is that we still don't know what exactly most of those genes do, much less how they interact.
What I was looking for was things you'd consider a 'revolution', IE a change in the way we do Medical treatment. Things like how anethesia revolutionalized surgury. Anti-rejection drugs allowed transplants. Penecillion and vaccines allowed enabled us to save thousands, even millions of lives that would have otherwise been lost to disease.
Targeting drug treatments by gene profile/blood work would enable us to determine if Patient X will have bad side effects from Drug A or B, which will treat the problem better, while skipping the 'just try it' stage. Targeted treatments of bacterial infections with phages will reduce/eliminate the problem of drug resistant infections.
Cloned organs would eliminate the shortage of donated ones we eternally have, and if we can use a patient's own cells, the substantial expense of having to take immunosuppressive drugs for the rest of their life.
It's been calculated that if disease and aging could be eliminated, and all the deaths were from violence/accidents, Americans would leave for 1554 years on average.
Do you have a cite for that? Last time I attempted to calc it I came out with 900-1000 for median* lifespan.