The way I use my PCs using a KVM switch would be more of a hinderance as I like to work on both concurrently. I mainly use one PC to play games or use applications on and the other for surfing the net and writing emails. Switching back and forth gets a bit annoying.

I suppose I should've reframed my original query better, what I really meant to say is a less messy desk. Two keyboards looks a bit messy and crowded. I thought a long bowed keyboard case with two sets of keys would look neater. It be almost like a Star Trek console on the Enterprise :D