These soft robots, developed by Otherlab, are one of the results of research into lighter, softer robotics. As a point, these biologically inspired robots are soft, but strong as their hard bodied cousins. Due to the less precise nature of building with soft materials, these robots have more sensors than a traditionally hard robot would need to hold or return to a position. With the cost of sensors dropping, these fellas came about at the right time.
The same company (Pneubotics, an Otherlab spinout) has been building a whole bunch of inflatable robots. I wrote about it a while back when Big Hero 6 came out: http://www.hizook.com/blog/2014/11/12/big-hero-6-soft-inflatable-robot-meets-big-screen