Microsoft develops shape-shifting touchscreen - tech - 26 November 2010 - New Scientist

Microsoft develops shape-shifting touchscreen: In the patent, Microsoft proposes coating the display with a light-induced shape-memory polymer. This becomes hard and protruding when one wavelength of ultraviolet light is transmitted at a pixel, and soft when another wavelength hits it. By modulating these wavelengths, texture can be created, the patent claims.