You've been watching Battlestar Gallactica huh? Our machines don't generally last as long as our bodies do today. But yeah, if we could copy a person in some way and repeatedly transfer them, then they could just keep skipping from body to machine to machine.... Though even then, I don't think you'd live forever. Some freak accident would happen eventually so it wouldn't be forever, just a long time, because something highly unlikely repeated infinitely leads to near certainty of it happening
Battlestar Gallactica? what is it? There are two points: The body of a machine can be repair/replaced easily. and we can have countless copies of our brains, if mind copying is possible. The conclusion: I will live forever, is it like digital copies of a fmous video/music, it will exist till the end of the world.
But will the copy be YOU? If they were to make copy of you today would it have YOUR awareness, or would it just be a COPY of you? I maintain the answer is obvious as you would not be aware of your copy's thoughts once you are separated, nor he aware of yours; so you both have separate awarenesses (sp) and so are separate and distinct individuals, though the world would be unable to tell you apart. You might be able to make everyone ELSE think you are immortal but as far as the only one who really matters is concerned, that is, YOU, you can't Battlestar is not a good analogue really, or maybe it is. The Cylons were not faithful copies of the humans but neither were the humans faithful copies of themselves really, or maybe not, (and is that why you didn't see many children? I never really did figure that show out.)
we only can do it as best as we can. I believe my copies is another myself. - if my copies and I have the same character. they can have a different life.