What is actually happening to the patent itself? Are the "trolls" just licensing the patent or do they have to have full ownership of it? If the later were true and they could actually loose the patent to the trial winner the situation would get more interesting.
Not really. If they lose the case then in 90% of the cases it means the patent is worthless. So it would not make a big difference if they lost patents which anyway would be worthless.
This law just forces them to be more careful with creating a new company for every lawsuit. A slight increase in their cost of operations perhaps but nothing much beyond what they are currently doing.