Hey guys,
I do know that some laptops can play 5 at once. I have an alienware m-51 with a core 2 duo (desktop version) with dual video cards SLI Gefore 7900gtx OC and 4gigs of ram, solid state hard drive for main OS and raptor 10krpm hard drive for my WoWs. The key is to have some extreme graphic processing power. It plays 5 wows just fine.
Too bad I never use the laptop. Ever. Wanna buy it? :)