I think you're wrong. The next step is to try and force churches to accept their lifestyle and their 'marriage'. Its going to be happening in Chicago this weekend where the 'rainbow sashers' are going to attempt to receive communion in the Catholic parishes with their sashes on - a public statement of opposition to church teaching.
you've got a good point, but that will be left up the churches. Even they know that the courts can't force churches to accept them. And this couple seems mostly interested in legal definitions.