I really don't see that happening. PC hardware is already varied enough, could you imagine the hardware compatibility issues that would come up if every component on the motherboard was modular and made by different manufacturers?
At least now the motherboard is a single unit, and all the components have been designed and tested to work together.
Plus, PCI-e is already a very fast bus, and has yet to reach it's performance potential.
Last edited by MS3FGX; 06-05-2009 at 10:51 AM.