Here's another incipient technology right on the cusp of true functionality. The holy trifecta in medicine right now is 3D printing, stem cell therapies and CRISPR. Each one is astonishing on its own, and together they have the potential to synergize like gang busters.

If our species can survive until these techniques are fully mature, then loosing your liver to cancer could one day be the medical equivalent of a broken leg. That may seem extreme, but takeb to their logical conclusions, these technologies have the potential to enable those kinds of results.