no reason why NV couldn't get motherboards made that have 128/256mb GDDR2/3 soldered to the board along with a GPU (eg 9400) that connects to the existing PCI-e connections when activated in the BIOS, and passes the PCI-e lanes to a PCI-e x16 connector when disabled, basically like the ATI rage chips with their 4 or 8mb vram that you get on server boards

personally i'd buy a board like that over a motherboard with a GPU that accessed system memory in a second. i hope they lose this case just so they'll go ahead and do it!