3D printed bike

^ yeah. I understand that it's just a prototyping device (I've used one at my university workshop actually, it's amazing to watch), but I can see some real consumer demand for things like that when the technology becomes better and more affordable. I guess the printers might one day have different powders that can replicate many materials, so even complex multi-material objects could be printed; printable electronics are perfectly feasible. Imagine downloading the plans for a new computer and just printing one off!

This can already be done, with metals anyway. You basically have an ion gun for the metal you are using. And you spray it where you want it. If I can remeber who makes these I will post