Sensitile - responsive material

"SensiTile is based on a patent pending set of new technologies that allows the material to become sensitive to changes in light intensity and color. Due to this ability a SensiTile system will respond to the movement around it by creating a dazzling set of ripples on its surface. The technology is completely passive in that it does not need to be powered but instead uses daylight and ambient light as its source of power."

OK, some interface designer should be able to think of a use for this technology ...