At Duke University, a monkey controls a virtual arm using only its thoughts. Miguel Nicolelis had fitted the animal with a headset of electrodes that translates its brain activity into movements. It can grab virtual objects without using its arms. It can also feelthe objects without its hands, because the headset stimulates its brain to create the sense of different textures.
Incredible stuff. In a few years, people may control, operate, and sense prosthetic limbs with thought alone.