this is a cool submission from reader and Austrian innovation blogger Hannes Treichl. "iBar is a system for the interactive design of any bar-counter. integrated video-projectors can project any content on the milky bar-surface. the intelligent tracking system of iBar detects all objects touching the surface. this input is used to let the projected content interact dynamically with the movements on the counter. objects can be illuminated at their position or virtual objects can be 'touched' with the fingers." check out the video.