The court generally tries to avoid playing art critic. It may be better that they do.

To that end, a lot has been made of Warhol's soup cans, but the big distinction here is that he's not using them to sell soup. Sure, they are a different medium and all, but the really important factor is that those paintings don't have the same commercial purpose as Campbell's ads.

In this case, his art did have the same commercial purpose and was a close copy, meaning that the fair use analysis didn't go his way.