Whenever I've thought about the concept of immortality, I've figured that, while it may be medically possible one day, the sociological problems with prevent it ever becoming available to the masses. We're overpopulating the world as it is, and if people keep having children and nobody dies, you have a recipe for disaster.
So, who decides who gets to live and who gets to die? It's not practical for everyone to live forever; however, the technology will one day be available. Is it going to just be for the uber-rich? Would that not create civil unrest?
Dunno. It's all food for thought. There may be answers to those questions, but I don't know what they are.