Elon Musk and his fellow engineers at SpaceX have combined the Leap Motion gesture-sensing controller, the Oculus Rift virtual reality headset, and a metal-printing 3D printer to create "the future of design." The video, published by SpaceX (embedded below) and starring Musk, shows what it might be like if engineers could create and manipulate designs with just their hands, like Tony Stark in Iron Man.