Re: One word:
Immortality is unlikely I'm afraid.
1. It's not possible, even with switching off age genes, regrowing limbs etc. Cancer is still not preventable, nor are a number of degenerative disorders, genetic or otherwise.
2. The social and economic repercussions are unthinkable. There world is overpopulated as it is, the last thing it needs is people not dying. Expect gene therapy from point one to be outlawed or legislated to..errr...death.
3. Would you really want to be immortal? Especially if you were the only one in your family to afford it? Seeing all your children, grand-children dying? Nah, no thanks.