Ages of the conservative Supreme Court Justices:
76 Antonin Scalia
76 Anthony Kennedy
64 Clarence Thomas
62 Samuel Alito
57 John Roberts
While they can all probably hang on another four years, Scalia and Kennedy are both of an age at which there's always the potential of a sudden heart attack. Which means that Ricci v. DeStefano is on the precipice of being overturned. Ginsburg strongly hinted that it would be overturned as soon as liberals get a majority of the court. And that's probably just the beginning of what liberal Supreme Court will do.
If Republicans lose again in 2016, which is highly likely, then the era of a conservative Supreme Court is probably doomed to come to an end.