Yeah, like it makes sense to sue when there's nothing to be made.
In American copy right law the patent holder has an obligation to inform an infringer as soon as infringement is discovered that they are infringing. Failure to do so can have a detrimental effect on the possible remedies. Translation no crap like you guys are describing.
We are talking about some companies that do a LOT of research so the possibility that they have prior art or can show this patent to be lacking in some way is very possible. Holding this up in court is a possibility as well. I think I will hold off throwing my player in the garbage for a while yet.