Take a slice of that rubbish bin's midsection, and you have the Mac Mini. Tilt that Mac Mini on its side, perforate either end, then add some handles, and you've got the G5.
You can play this game with just about everything Apple has sold since this machine was introduced. Virtually all of it has some design cue that can be traced back to the Cube, and no further. It really was the Genesis Box.
Ive's work in plastics hasn't held up as well since the switch to metal and glass, but at the time it was a remarkable, groundbreaking example of industrial design. The next year, of course, they launched the titanium PowerBook that spearheaded that transition, though it would take about a decade for plastics to be phased out entirely.