Based upon the Prop 8 oral arguments and questions from the judges, Prop 8 may be in more trouble than I thought.
There is a question as to whether the proponents of Prop 8 have legal standing to defend it. Roberts in particular appears to be showing doubt that they do.
A ruling that Prop 8 proponents have no standing would, I believe, leave the circuit court ruling in place and Prop 8 would fall.
I found it amusing that Justice Ruth Bader Ginsburg pointed out to the attorney defending Prop 8 that he was relying on case from 1971 when homosexual activity was still mostly illegal.
Those of us in the real world find that bizarre but conservatives, in their bubble, probably don't. It must be terrifying for them when reality finally comes crashing in.