The singularity. Some people fear the machine uprising but I don't really. If it got to a point where I could transfer my conciousness to a machine I would effectively be immortal, I could launch myself into space and just hibernate. What if I hit something and am destroyed you ask, it's a good thing I sent myself out more than once. Of course then it becomes a question of when do I stop being me? That's a more philosophical thing in my opinion though.