>Removes a provision that prohibits a patent from being deemed invalid based on novelty, prior art, or nonobvious subject matter solely because a defense is raised or established based on prior commercial use.

This looks kinda troubling. I'm no lawyer, but it looks like this section makes it impossible to declare a patent dispute invalid due to innovation, i.e., you can be sued for infringement if you make a better mousetrap, even though you have demonstrably improved the design.