Today I bought World of Warcraft, to see what the fuss was all about, and also to see if my 7 year old P4 could handle it.
I played it for about 30 minutes, and got motion sickness bad. It's now an hour later, and I still feel like throwing up. I can't handle 3D. Time to lie down. Will cancel my subscription in the morning.
Oh yeah, the P4 handled it easily in Windows 7 Pro.