Computer Controlled Apparel:

Today it's possible to wear a shirt with a small embedded computer that controls lights and filaments on the shirt. In a few years there'll be shirts whose material changes color, and possibly texture, under computer control. Most of this will be pretty silly, but I was fascinated to remember how long this sort of thing has been going on. I knew a hardware designer who constructed shirts for his friends with dozens, or even hundreds of LEDs that blinked on and off in marquee patterns. He was doing this in the late 1970's. (And yes, it was impossible to clean these shirts.)