According to Brown University: "It's thin, light, flexible - and plastic. Brown University engineers Hyun-Kon Song and Tayhas Palmore have created a prototype polymer-based battery that packs more power than a standard alkaline battery and more storage capacity than a double-layered capacitor. Their work, published in Advanced Materials, will be of interest to the energy, defense and aerospace industries, which are looking at more efficient ways to deliver electricity."
IHMO: One of the key technologies that will drive future development, are better batteries. There are some many things that we can't do because we don't have really good battery technologies to leverage (that are also mass producible, and economical to build). Hopefully this and other recent advancements (such as: capcitors or maybe even fuel cells) we have seen in batteries might start seeing some cool next generation technology that are able to leverage it.