Team of researchers headed by David Scott at MIT Lincoln Laboratory's Technology Office Innovation Laboratory (TOIL) are now working on ways of improving the 3D Printed Prosthetics. Better finger motion, non-electronic temperature, motor technology and tactile feedback are the starts, and they can be added to any e-NABLE prosthetics at a cost around $350.

Source: http://news.mit.edu/2016/lincoln-laboratory-lends-3d-printed-hand-0901