We're gonna go with Blizzard and make the system requirements for the game = to 3 yr old comps when production starts so alot more ppl will be able to play it and wont have to buy a brand new comp / graphic card to play the game So expect about 2006-2007 Comp Requirement, maybe even lower than that, for graphics card
NVIDIA GeForce 6150 Graphics Card or better
5800's the requirement for Age of Conan, who's engine is being reused for Most Anticipated Game of 2010, so for a game prob not coming out til 2011 or possibly even 2012 thats a decent requirement (my comp which i bought in 2005 has that, so the majority of ppl should be fine)