Well this has been the talk of the century. Now that we have invented technologies that was far sophisticated than previous and the dreams of yesterday are now realized, scientist are now trying to do what has been impossible. They have tried things with nanotechnology, try to imitate how the brain functions and the idea of copying brains memories to a digital form are part of these studies. Looking at how brilliant people are they could probably do this sometime in the far far future. But immortality is a thing that no one will be able to do in my opinion because even the lifeless matter gets destroyed as it gets old. And we are composed of matter that wears out against time.