What is the most interesting thing you have seen done with a 3D printer or 3D printing technology?

certainly the Dexmo 3d printed motion capture device for your hand. that is going to bring a whole lot of change to the field of VR and real-world control systems.

If you could build your dream 3D printer, what would it include and what would it do? Let your imagination run wild!

The matter replicator from star trek! print whatever I need to survive!