I remember watching a TV program about wave/fluid simulation (real time?) as a wow-wee demonstration of the power of a Cray-1.

In the meantime plenty of colleges and companies were running entire departments on a PDP-11 that had a fraction of the power.

Raspberry Pi faster than a Cray-1 is cool benchmark of how far we have come! The Cray had built-in seating though, which the Pi doesn't! :-)