Ahhhhh more LED's. Right now, the entertainment lighting industry is going through an LED revolution, they are popping up everywhere, and let me tell you this, they can be extremely bright, are normally very expensive, but are also extremely robust. Just to get an idea, go check out
www.colorkinetics.com or
www.pixelpar.com I could see them putting in an RGB array into the same sort of enclosure that has been used in the past, but with a clear lens and the color comes from the LED's, you could theoretically have 16.7 million different colors!!!!!!