I'm a long fan of demos, that is real-time computer animated demonstrations of skill. Or, as the guys themselves would probably say: I can do more pixels per frame than anyone else! (And in 16 colors, too!)
Ah, the good old Amiga times. Of course today, demos are more like music videos or even movies and no one has to worry anymore that Denise would eat too many cycles. Today, the main problem is probably to raise the money for the production ;-) Just check this one out:
"Lifeforce" by Andromeda Software Development, a well deserved rank #1 in the combined demo competition at Assembly 2007. Congrats!