a recent patent application by Philips for a new type of screen based on "furry" pixels, or physical pixels made out of a pieces of fabric covered with hair-like strands. applying an electrostatic charge causes the hairs to repel each other & stand on end, revealing the contrasting color of the fabric below. Philips claims it is possible to build an array of pixels as a furry display that can show complete images.
the original idea reminds me of wearable warnings & the technology developed by International Fashion Machines (IFM). see also Philips' lumalive or pixels represented as ping pong balls & air bubbles & flames & water splashes & water droplets.