Everyone's focusing on Justice Kennedy as the swing judge and how he seemed sympathetic to the adopted children who would be happier if their same sex adopted parents could get married, which is certainly significant, but I think it's this exchange that marks the point where the logical end of this became clear. If a rational decision comes from the court, it now has to be to strike down Prop. 8, just based on the above exchange alone.
I guess the homophobe lobby had to come up with some kind of argument that sounded vaguely technical. Somehow the fact that Justice Breyer sounds like Jeffrey Tambor makes it all the more delicious.