California gay marriage - dissenting the Supremes

A dissenting opinion on Calif. gay marriage: The Supremes there should not mandate it but should also not stand in the way of letting the legislature do it. Gays in Calif. do have domestic partnerships and a voter backlash against the Supremes could wipe out DPs too. Such a ruling would also make Arnold's position less firm, making it more likely that he won't veto the third attempt by the legislature. It makes me wonder how long we must wait to avoid threatened voter backlash?