All of the 3dmark tests are cheesy, you can see that they are just making generic goofy video game scenes and are not aiming really for aesthetic appeal, but rather to stress computer hardware.
If that's a dx9 benchmark, why the hell wouldn't it? Xbox2 should be just as good if not better. New video chipset better than anything out right now + 3 core cpu + being able to take advantage of all that to it's full potential = games that look better than anything a pc can do now (game, demo, or benchmark).