According to the Los Angeles Times, The U.S. Supreme Court may not hear the Prop 8 appeal, since the ruling of the 9th Ct. was narrowly tailored to fit California’s situation.
The opinion of the 9th Ct. said that Prop 8 was unconstitutional because it took away a right already granted to gays/lesbians by the California Supreme Court.
Since the ruling did not say that gays and lesbians have an equal right to marry under the Constitution and instead decided to rule only on the narrower topic (constitutionality in California’s context), the Supreme Court might decide to stay clear from the issue for the time being.
Even though the Supreme Court might not decide to take up the case right now, that does not mean it will not in the future. Eventually, it will reach the Supreme Court, and I can only hope that when that day comes, they will rule in favor of gay marriage.