The Skin Buttons project by Carnegie Mellon's Future Interfaces Group is taking digital projections to a new level. Working buttons are projected onto skin. This is done by using small lasers to create small, bright red icons from the bottom of a wrist watch. The touch-sensitive buttons can be designed in any shape as well and therefore display a variety of information.
Described as "cheap, small, low-power and clickable fixed-icon laser projections," Skin Buttons were developed by Xiang 'Anthony' Chen, Chris Harrison, Scott E. Hudson, Gierad Laput and Robert Xiao of the university's Human-Computer Interaction Institute.
As John Biggs of TechCrunch explains, "by expanding a watch interface off of the physical object you get a bigger palette on which to create." This also allows users to interact with the interface without making the screen larger.