I dont think we will, the guy that decoded the genome has been saying the benefits from decoding dna have been overstated.
After all dna is just the blueprint, its not the result.
Proteins is probably where its at.
I think within 40 years or so we will see treatments which extend lifespans or retard ageing.
Don't see how that's a problem, If you can see the blueprint of two healthy people and one ill person and notice the obvious mistake in the ill person blueprint compared to the healthy people, job done. It was an issue of the time it take to see these problems, but now were down to 3 week turn arounds, it should be easier. This being my speculative assumption though, I'm not medical scientist.