So what? That was possible even without this decision. The gays wanted the court to discover a constitutional right to gay marriage. That didn't happen; they lost.
They did not lose. Any judicial imposition of same-sex union recognition is an illegitimate act by the Courts. Only the most radical demand the word 'marriage' as well, while the more clever are content (for now) with gaining what is in effect gay marriage in all but name.
The most certainly did not lose.
The NJ Supreme Court has discovered a constitutional right to gay civil unions, which the Legislature must pass, which must be the equivalent of the marriage statute in all but name. They won everything except the name, which is 99%.
They will be back - they are not giving up - they will go to the gutless legislature and they will get one. The decision stated that it is unequal not to have marriage for members of the same sex - it gave the legislature cover.