This ruling is regarding the upcoming primaries, (although I have to imagine it would apply to the general election as well assuming he gets the nomination) so it would deny him any delegates he would have otherwise won in CO. If enough other blue states barred him from running in their primaries, it could, hypothetically, result in someone else getting enough delegates to win the nomination at the convention, although I have no idea how likely that would be.

I'm glad it's on the books at least. Have to start somewhere and set precedents otherwise nothing ever changes.