I don't get why many folks are missing the obvious issue - even if you manage all that, its at most a copy command, there is never actual move. You yourself would be staring at this other guy, probably being envious since form now on its him / her having the future, while the actual you who wrote that comment is about to be removed for disposal. And whole representation of universe and Earth you have in your mind would die with you.

You would have to move every electron traveling in between each neuron into exactly same place, same momentum etc. All of them in the same time obviously. I stress the word move. In a system that is constantly moving on molecular level at crazy speed. Even that is only valid in case our consciousness is just electron cloud at given moment travelling in the brain. Maybe its more, all interconnected.

How you want to move that. The science for that won't be around for millennia, if ever (there may be quite hard constraints on quantum level in similar way speed of light is hard limit for Star trek utopias, universe doesn't rearange itself and change its laws just because of our emotional wishful thinking). Once we can do that, it means we could mess with telomeres, DNA etc with 100% precision and knowledge so this will be a moot point. Don't hold your breath for this.