Say hello to our first step towards real cyborgs! While this seems a tad ridiculous, it's important to keep in mind that flexible electronics are very real, and the ability to power them with flexible batteries is very real as well. With the ability to add flexible transistors to the mix we can very possibly have the right mix of technologies to make electronics take a whole new shape - literally!
The medical applications for this are far greater than I believe we can expect when this innovation is in it's infancy. Pacemakers could become vastly more efficient, and vastly less harsh on the body. We could implement similar tools for limbs with nerve problems, to help regulate pain receptors for those with extreme pain. It could be used in physical therapy, by allowing us to employ a bone density monitor directly into the body.
There are just as many commercial applications for this technology, although I can see many of them being more cosmetic than practical. For the time being, let's imagine clothing for researchers in arctic circles, than can monitor core body temperature and increase an electric heat conductor in the garment to increase body temperature when it's getting low. We could introduce clothing for our military that monitors vital signs on the battlefield, that constantly streams data to a command center so every soldier is accounted for.
While there are many more possibilities for this technology, I think it's important to leave it open for debate. You never know what we can apply this kind of innovation to!