Duh, it is no better than the 2600x2 and the x1950prox2 before it. I still remember the quad 8500 and the quad 9800pro. The biggest card that I have seen used up 4 pci slots (w connectors) and used yet another pcb for frame synch.
$300.... for a gaming GPU it's a retarded idea. I guess I can see how it could work for a business application with the independent display controllers as notty22 pointed out. But still, $300 is ridiculous for that card in my opinion.
Heck, for $300 you can get a GTX 470. Yeah, like I said, gaming wise this card is ridiculous.