I haven't seen a lot of performances held by a computer, though. But you're right, the Macintosh was in most of them. Try showing the new iMac ad, where the iMac performs something similar to a pantomime's performance.
try searching this site. there have been sveral good threads and parts of threads about this with contributions from racerX and the other hardware junkies. I would guess words like 'speed', 'memory' , 'cpu', etc might bring them up.