The argument gets weaker.
After the "Alice Corp vs. CLS Bank" supreme court ruling which states that "let's do it on an computer", where it is something that is well known, prior art, common practice, etc. is no longer patentable. The court stressed that the ruling was limited to the case at hand, but that hasn't stopped [at least] two lower courts from applying it in new rulings.
Samsung recently tried to apply the ruling retroactively towards the [infamous] slide-to-unlock patent, but was shut down by Koh merely because Samsung didn't raise the argument at trial [they were too late].
But, with the Alice decision, slide-to-unlock is completely invalid, and Samsung [and others] will be able to use this in future proceedings.