I think, as far as my understanding of biology goes, that freezing your body doesn't preserve it for future reanimation, just stores an intensely frost-damaged version of your corpse.
You're cooled to a temperature in which the frozen water in cells doesn't rupture cells, plus the blood is replaced with a cooling liquid. The only thing it does is slow activity in your body by a lot, and delaying body decay, in hope that revival in the future will be possible. There is no cure for it, and it is only done after death.
We have already read images in people's minds, which is a crucial step in understanding processes of the brain through electronic machinery, a step that will eventually store our minds, and perhaps create another consciousness of us, inside a computer.
There are organisms with fast regrowth such as Hydra.
I've read about an organism that can "roll back" into it's earlier stages in life if it encounters harsh area conditions, shielding it from death by exterior damage and interior damage.
Cloning is at its first steps but has open room for research.
Lengthening the telomere may fake longer cell life, but is known to turn normal cells into cancerous cells.
It is no longer a question of "if". We will reach it. The only question is, whether we'll still be alive when it happens.
