Oh bunk. They've been "rolling it back" for years and yet more people than ever are on it.
Social welfare programs are never repealed! When it fails, and it will, we will be rushed into their end game, single payer, to save the economy. It's been the plan all along.
If it is delayed long enough the chances of implementation decrease dramatically. For one, Obama will be nearing the end of his term and won’t have near the political capital necessary to convert what is left of O-care into an larger scale, more ambitious program. He will likely also be dealing with a more conservative Congress if it does start up in 2014.