If nothing else, in a few years, this will be pretty cool for those skeleton builds from old PC parts. Video cards, especially high end ones, become obsolete very quickly. They require a lot of power and once they age past a certain point, it's hard to find a buyer/home for them since most who'd be interested, with a rig capable of running a high end video card are already using same/newer tech. Having the ability to use two video cards from varying manufacturers could breathe some new life into these old, obsolete cards. That said, I always use a single video card myself.