DNA and proteins are basically nano bots. If and when we get to a point where we have full control, we will simply grow a super computer from a single cell. Why build a house when you could just plant one? Need a new body? You don’t need fancy computer tech to transfer consciousness. You just need an organism to connect two brains and copy neural pathways. You grow your new body attach the organism that copies the pathways and walla, you are 25 again. All this would be easy with full control of dna.