How about a line of clothing that has LEDs built between layers of fabric, all of it controllable from an app or responding to things like ambient temperature, your mood as indicated by your Twitter feed or the beats of music at a club?
New Scientist reports that just such clothes were shown last week at the International Symposium on Wearable Computers in Zurich. The line, called Lüme by designer Elizabeth Bigger, consists of a bomber jacket, a tunic and a backless dress; the LED layer is removable so the clothes can be laundered.