Microsoft’s Schrodinger’s Razor

The answer is both really smart and really stupid, but you won’t know which until you look at the source, and you can’t view it.

What do you see?

OK, I’ve read the wiki entry but I still don’t understand what KVM is, or why it’s needed. The last time I visited a data center - every server rack came with a laptop-esque looking control unit. What problem does KVM comes to solve? What does this invention improve upon a traditional KVM?