I agree with Ezra:
The moment one party or the other filibusters a consequential and popular bill, that's likely the end of the filibuster, permanently.
And entirely. For Klein is undoubtedly correct that neither party would now "accept filibusters of qualified Supreme Court nominees," either. And, as noted, as a minority tool of legislative obstruction, it's as good as gone. For the moment there's no reason to eliminate filibusters of legislation, since all legislation dies in the GOP House anyway. Should the House swing Democratic in 2014, however, and Reid retains his Senate majority, then will come the entirety of the filibuster's death. Or, Majority Leader McConnell will finish it off in 2015.
It once would have been not only unreachably ironic, but downright unthinkable that conservatives--whose philosophical bedrock is tradition--could ever be responsible for killing this senatorial heritage. But that was when conservatives were actually conservatives, rather than the radical thugs they are today.