As I understand it, the current research is focused on preventing cell death, which is the cause of aging. All cells (with a few exceptions like sperm) can only replicate a set number of times before dying. If you can extend or eliminate that replication limit, then your body will be frozen at its current age. If they apply that treatment on you when you're 30, at age 70 you'll still have your 30 year old body. Although with a cybernetic body, you'd be able to jump 30 feet into the air, which is pretty cool. But it's probably a lot cheaper to take a few chemicals that modify our DNA than to have a mostly or fully robotic body.

Of course, as soon as we develop somewhat realistic androids with somewhat realistic AI, it will be the end of our species. Most men will buy and live with female androids, and never reproduce. Birthrates will plummet.