That's an interesting take as well. I agree with you on that an endless life of eating, shitting and complaining would be a worthless pursuit but I think that we would redefine what it means to be alive should we achieve this idea of immortality. I think we would find meaning in other ways and we may not even have bodies in the same way that we do now. We are already becoming cyborgs (just look at mobile phone technology, eye technology, transplant technology, etc. etc.).

Life in 100 years will likely have little resemblance to life today. I can only imagine what it would look like 200, 500 or even 1,000 years from now!

As for your idea about people like Hitler getting immortality: I don't expect us to become truly immortal (as in nothing in existence could end us) I think that it's more likely that we will become amortal which is the idea that you could live forever if you don't die from whatever it is that you're vulnerable to.

So if someone like Hitler came along, we could get rid of them if they were causing some major issue (just in the way that we get rid of people now - imprisonment, death, war, etc.).

And to counter you on that, imagine if people like Isaac Newton and Albert Einstein and Da Vinci were immortal? Would their contributions to humanity outweigh the few negative actors that will also appear, like Hitler?