Touchless pointing system
Touchscreens are wondrous things, but nobody likes smudges, and attempts to magically prevent oil from sticking haven't always found success. The proper solution might not be in fancy screen coatings but rather in removing the touchability together. Tokyo University has developed a system that uses a high-res camera to identify where a finger is in 3D space, so moving around and even air-clicking is detected.
Source: engadget.comAdded: 12 January 2010