Saul Griffith, maker hero and MacArthur "Genius," has released video evidence of his latest creations, inflatable robots. So far, Saul and his colleagues at Otherlab, Meka Robotics, and Stanford University have built a 15-foot-long walking robot, called the Ant-Roach (that I've seen Saul's toddler son riding proudly atop) and a robot arm/hand.
Lightweight, low-cost inflatable robotic arm
More detailed info at Hizook!