In the future, a lot of things are going to be touchscreen. And a research team at Harvard University has developed paper electronic touch pads that cost just 25 cents per square meter. That means a lot of things because its so cheap, it can be implemented on almost anything anywhere.
These inexpensive displays are made out of paper that has been coated in aluminum and a transparent polymer. With the aid of an external circuit, the metallized material becomes a capacitive surface. The challenge is now finding an equally affordable power source, as well as reasonably priced, flexible electronics.