@ smudgee : I confirm, the scanline is also multi-threaded and on a quad you get a really nice speed out of it (but still slower than mental ray without GI, mr is really amazing). Quads are indeed excellent when it comes to 3D rendering (there is a nice benchmark for Vue and results really show the "linear" progression : with the same processor, same clock speed, a quad is about 1.8 times faster).
I'm not much of a gamer even if I do enjoy looking as screenshots but I'm pretty sure games will soon all be multi-threaded too (8 cores processors are just around the corner now and multi-threading will become a must for all software sooner or later)
I know the software industry is often a bit slow at catching up with the hardware part (64 bits OS are a proof of that : I've been running XP64 for over 2 years now but for some people - and manufacturers (see drivers) it's still considered to be more a "gadget (well, with 8 GB memory, I assure you it's not, it's a blessing

@ Phil999 : you're welcome. Max is a very complex application and it's very hard to know everything about it :)