In theory memories can be downloaded and stored, and eventually we can make an electronic brain, or even just have a program that accesses a brain. We are not really that far from the technology needed.
This has some....drastic consequences, since once your brain can be stored electronically, a digital world would be as real as ours. Not only would everyone be immortal, they would have full 100% access to all memories, and we would have infinite space in which to live and explore etc. Anything imagined could be created, and the rules that apply, would be up to us as well.
This may sound like science fiction, but, just think about what we have today, and how it would appear to people 50 years ago. The wireless internet + google can answer almost any question and provide almost all the info humans have accumulated to anyone, anywhere at this point. We can talk with each other from anywhere in the world, and take a picture of anything, anywhere and share it instantly with everyone.
It's possible that those of us over 40 might not live to see the world drastically change, to a point it's almost unrecognizable, but those who are under 20? Unless they die from something besides old age, they will probably not die at all, as within 80 years or so, I think any human being can be immortal.