Unfortunely, they only win with strong arm tactics. They have actually only settled or even drop cases versus emulation. Mostly cause there hasn't been a definitive ruling on it legality, though many other cases, such as add-ons, rentals, VHS, and Clones have actually been ruled legal in a court of law.
Case in point was Dolphin, they only went after the steam release, and their lawsuit against them for LOCKING hardware copyright, which is a patent, not a copyright issue, isn't looking too good for them.