My first computer only had 256k RAM and I couldn't play Diablo II. Then I upgraded the ram to 512k and it worked, but by then all my Diablo II buddies were gone, having graduated before me and moved on.
I know my laptop can play WoW, but my desktop plays it only slightly better. So i'm not too sure. I might buy it and try it out, but what's the fun of playing with dumbed down graphics?