I have a laptop with a Core 2 Duo, 2GB RAM and Nvidia 7950GTX mobile. I can run 3 WoW clients with no problems at all. I could probably run more if I needed to. They are all in separate directories and in 1280x1024 size windows with all graphics turned down, except clipping plane (terrain draw distance or whatever it's called).

The laptop you linked doesn't seem to indicate what graphics chip it uses. That will make a large difference. Other specs are fine though.