It wasn't an argument made in the courtroom, it was an argument made by one of the jurors during their deliberations. Obviously it's completely false: which processor a the program runs on ought to make no difference whatsoever to whether a system including that program infringes a patent.

In a just world, this would constitute grounds for an appeal by Samsung all by itself, but I've no idea what the legal position is.

That would be why it's being mocked by mullingitover.