Prior to that exchange, was there a question(s) before the court regarding Puerto Ricans and weather or not they are eligible to be POTUS?
The issue has nver gotten to the Court; no Puerto Rican has ever run for President. But, if you check the links up above on this thread, Serrano asks Thomas about this every year and it has become a running joke between the two of them.
Not as far as I know, if there was the current situation would have more clarity.