The court is expected to rule in favor of gay marriage. A few years ago, pro-family groups feared such an event would take place in Hawaii. That did not happen. Although there is a national Defense of Marriage Act, many states do not have such a statute on the books. That essentially is why we need to pass a law stating the obvious.
Marriage involves a man and a woman.
It is not for courts, politicians, or even legislatures to alter or redefine. It's troubling that a legislature even has to pass a law to state the obvious. But that is what needs to be done. In a society that has lost its way, marriage has come to mean more than what God ordained. That's essentially why we need the law.