Researchers unveiled a new use of nanotechnology last week at MEMS Japan 2011. The keyboard above embedded in an ordinary cloth handkerchief, and it's not made from some exotic fiber. It's one of the projects that the BEANS research institute is working on in Japan.
This won't be any good as a screen, but how would you like to wrap a keyboard around your handheld and simply shove it in your pocket? That's what you can do with this new tech. You could also build the keypad for a phone into the sleeve of your coat. (Now that would be useful.)