I set up my new(ish) server PC with a remote connection through LAN to my main PC. The server is now operated 100% remotely, I no longer need a monitor, keyboard, mouse or anything else like that connected to the server PC - I just pop the window up on my main machine and I can use Windows within Windows (sorta).

It's weird actually, because I keep thinking anything I do to this machine will affect my main PC, but it's all run through local hardware. Brilliant :D
Now the brainfart part.
Soon enough, computers will have a system where all you buy is the monitor with an ethernet jack. The computer itself is somewhere else in the world with incredible hardware, but you get to control it locally. Can you imagine the possibilities with this?