@ChrisJWilson My naive understanding is that it's less about overturning a ruling though that does happen. But, this isn't a law that is either "on" or "off". The key is that it sets a new, different precedent. Then, once that precedent is in place, other courts can rule based on the new precedent. All of this leads to a body of precedents that then become the "way it is." So, one ruling might not change anything but it opens the door for lower courts to rule in line with that which does change our experience as citizens.