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Touchscreens are selfish lovers, taking your gentle caresses and
impatient taps without offering a hint of feedback to you. We've seen
attempts to change that, like prototypes from Toshiba and Senseg that
add a bit of texture to a touchable surface, but now Microsoft might
be looking to bring such dynamic tactility to the one of the biggest
touchable surfaces: Surface. A recent patent application entitled
"Light-induced Shape-memory Polymer Display Screen" describes a
technique for a display that uses infra-red light to detect touch, but
also to "selectively change a topography of the topography-changing
layer." In other words: to make it bumpy or smooth. Certain
wavelengths of light projected on the screen can cause areas of that
topography layer expand or contract, which could finally mean all our
cries for attention might finally be responded to in kind.
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