Thanks Steve, now I have that Queen song stuck in my head
(I rewatched it a year or two back, great movie)
I would like to humbly recommend 'Down and Out in the Magic Kingdom' by Cory Doctorow, which notes, in the course of the story, two valid points about 'immortality by antiaging' and 'immortality by cloning and memory graft'
1. You can keep the physical frame of the body alive through advanced technology but at some point the capacity of the brain will be maxed out. At this point you can extend the capacity of memory through use of digital uplink technology. (My thinking: storage of memory on computing devices is again finite. Given limits of physics as we know it, eventually you will run up against the limits of memory and you will begin to lose memories. IAM as 'the self' is made of memories once the memories begun to be lost 'the self' is no longer the same person- so basically it is a different mind in the same body. Is this immortality? I would say not. )
2. Immortality by cloning and memory graft- the characters in the book do a weekly or monthly cerebral backup which captures all the salient bits of their memories and personalities. If they happen to perish, their memories are reloaded onto a fresh clone body. My thinking: Is this immortality? I would also say not, this is cloning.
In sum Either we need to reexamine what it means to be alive, discover magic, or resign ourselves to the fact that becoming immortal is going to be impossible. In the meantime we can comfort ourselves that all the sci-fi reading we've done turned out not to be an idle waste of time but rather extremely relevant.