I don't see why everyone is making a fuss about them. The fact is that they have nothing to do with the NV30. They were rendered in software using a 3D modeling program similar to 3D Studio MAX. Here's the link to the website where they pictures were taken from.
And yes I realize exluna is owned by Nvidia, but those pictures were on their website before they were purchased.
As you can see, each of the pictures was using different software. The motorcycle was built using Maya, Mayaman, and Entropy. The picture of the table and the picture of the pens were made using BMRT.