I think Tennessee is calling them out saying "hey, so tell us how we CAN or CANNOT write our marriage law, since "between one man and one woman" is no longer the limit. Please tell us what the limit is."
And, of course, when you take away the majority's ability to regulate licensing and create a precedent that "sexual behaviors are = race protections" you have to delineate which sexual behaviors? All of them? Just some? Is marriage limited only to two? And if so, why? Isn't polygamy a sexual orientation too? Etc.
The Court will have to clarify the mess for Tennessee (and all other 49 states).....annnnnndd...good luck with that one Kennedy, Sotomayor, Kagan, Ginsburg and Breyer!

This could even be a prelude to some judicial impeachments by the time this thing gets to SCOTUS.