The F-117 and B-2 are excellent visual examples of the advance of computing power over 20 years. According to the book "Skunk Works", both aircraft were designed to the same set of stealth equations giving shapes and angles necessary to be low-observable.
The reason the F-117 is all angular and flat-faceted, while the B-2 is all curvy and organic is that, when the F-117 was designed, the state of computers could only solve the equations in 2 dimensions, hence the F-117's shape is a collection of flat panels jointed up cleverly.
By the time the B-2 was being designed, computing power had advanced enough that the equations could be solved in 3 dimensions, resulting in the smooth curves of the B-2.
I thought that was a pretty cool example of technological advancement playing out in very real terms.