Was developed a snake robot which moves very similar to a real snake. This robot does not have rigid motors, has discs with 3 air bladders between a pair of discs.
Source: Science Magazine.
A pneumatic tube and wires run down the center of the stacked modules, controlling the collapse of each bladder and causing the appendage to bend in that direction, like a contracting muscle bending a joint. When the researchers attached a suction cup to the end, powered with the same pneumatic tube, it could pick up and place objects.
A bot with pneumatic arms and legs could clean windows, fetch objects, or explore through small openings.
A very good application would be make prostheses with this pneumatic system, or a wearable robot which allow a person to climb walls. Here is the video.
