I'm convinced - 3-D Printers are going to change everything
I was gobsmacked to hear the Prez mention 3-D printing in his SOTU - I've been interested in this concept for quite a while and am truly convinced that right now in 2013, we have no clue of the amazing, positive changes this technology can bring to the world (and yes, there will be those who abuse it, as with everything -- but right now, I'm focusing on the positive). Check these out if you haven't seen them:
TED talk on the application of 3-D printing to artificial limbs:
3-D printing applied in the field of architecture
Warning: This particular vid is super-geeky - but worth it!