Progressive Rock usually means stacks of keyboards, right? So how does Jordan Rudess of Dream Theater get away with just one? Usually in live performances you'll be able to see Jordan playing just one keyboard, the Korg Oasis -- and he has it mounted on a cool swivel stand so he can sort of move around a bit when he plays.
Well, I found a video where Jordan explains how this keyboard was able to single-board-edly replace almost all his other instruments in live performances. It's a fun video.