Metaio is demoing a new possible future in the evolutionary path for input control of wearable computing devices and it should be no surprise that Augmented Reality plays a role. The Metaio engineers have a novel concept that attempts to solve this first-world conundrum..

http://techcrunch.com/2014/05/22/metaios-thermal-touch-and-the-future-of-augmented-reality-user-interfaces/