Well THAT was fascinating. I don't see why not. BTW, NPC, he DID say how it could be done. In the segment over the 7 things that kill you, he said that they could all be cured in mice, at least theoretically, and that's why research must be done now, so we have the technique down in mice. After that, primate and then human trials could begin.
While I said I don't see why not, I am curious as to how the human psyche would adapt should the goal of immortality be reached. If noone died of age-related causes, that would still leave a host of other causes, but they would be more prevalent in some areas than others. It could make birth and death much heavier concerns for humankind simply from there being less of them, and I think that would take some serious getting used to for those of us who are accustomed to those things being everyday facts of existance.
Something else to consider: in the UK and almost every other civilized nation, healthcare is free- noone need be without the treatment to halt aging. But in the USA (at least for the forseeable future) healthcare is for those who can afford insurance. I think a very stark division between the "haves" and "have-nots" would appear in the US should this therapy become reality, and quite frankly, that pisses me off.