Save the Cheerleader, Save the World

Just another thought about Heroes. They saved the cheerleader, but how did they save the world? Well, if Sylar's power is, indeed, to absorb other folks' powers on a permanent basis, then if he'd killed Claire and eaten her brain (or whatever it is that he does), he would be unkillable. So was the world saved because Sylar is just really, really powerful and not invincible?