>> could i ultimately end up being another person, looking like another person, becoming someone else with the same memories i have of my life? >> well, we're going to be spending more and more of our time in virtual environments. one of the advantages of virtual realities, you can be someone else. it's going to be very realistic in the future. >> so if now i've shed this body but that's backed up, where will that be downloaded into? >> there's lots of scenarios where you can create a virtual body in physical reality, let's say with a swarm of nanobotts. >> will you have the ability to bring, say, loved ones back like my grandmother or your father? >> i have a project to bring back an avatar of my father. i have all of his correspondence and letters to my mother, videos and pictures and so on. we can access his dna at his gravesite. so if you imagine a future a.i., artificial intelligence, that's very, very smart, can take all this information and create an