The new CELL cpu maybe your answer. It will run multiple os's at the same time. I know it will run linux but haven't heard if it wiil do windows/mac. This is a chip jointly develpoed by Ibm, Sony, and toshiba. First product out of the box with it will be PS3. If it can do windows then everything will change. Like ps3 games ported to desktops. Linux then has a strong software base to be real competition to windows. Ought to be fun to watch anyway.
BTW it's not the motherboard that is important it's the cpu. The motherboard is just the supporting stuff you need for the cpu. So you should ask what is the mother of all CPU's? :-? :-?