Here is a robotic suit designed to help post-stroke patients with normal walking. Wyss Institute developed the robot for gait retraining and rehabilitation. This soft, wearable ankle-assisting solution is programmable and discreet:
This exosuit looks more like sports clothing than R2D2, yet it is equally programmable and carries out tasks on command; however, the exosuit is lightweight, flexible, virtually invisible to others, and individualizes itself for each patient.
The above video shows what this approach is all about. More info is available here.