As far as the scientific basis for this question goes--Yeah, as a non-practicing biologist I can tell you that we're getting close. In fact I would be surprised if it would take us a century to achieve relative agelessness.
That's not me talking as a 'futurist', whatever they may be, but as a guy who understands the hard science behind such potential break throughs.
To paraphrase Wierd Al's parody: "It's all about the Telomeres, Baby!"
http://abcnews.go.com/Health/Alzheimers/aging-reversed-mice/story?id=12269125#.UEaCJahRGso.email
The reason I don't get worked up or excited about this subject it is that the odds are good that everyone I love and I myself will be dead by the time they do figure it out.
OT: I voted yes because I like to keep my options open. Moreover while the science for 'ageless' immortality may come to fruition it's not true undying immortality.
Seriously, you may not die of old age but what are the odds of any of us who underwent a "Prolong" treatment (to use the applicable term from David Weber's Honor Harrington series) actually surviving a thousand years without dying in a car wreck, of food poisoning, or by being murdered, or struck by lightning, or getting drunk on our 999th birthday and tripping and falling down the stairs and breaking our neck, etc, etc?
And throw in the occasional caldera explosions, too. Mega-tsunamis, anyone?
We're all born into the grave. A 'Prolong' treatment just has the capacity to extend our time maybe a few centuries longer.
On a less fatalistically philosophical note maybe if I lived to be one or two hundred years old I would finally start to figure women out.
It COULD happen.
[small]Theoretically.[/small]