So, in Heroes, the primary villain Sylar seems to have a multitude of internal weapons at his disposal, most prominently telekenesis. He also seems to have the ability to fly, deflect bullets, and cyrogenically freeze people not named Walt Disney.
He also seems to target other similarly gifted people and steal their brains.
So, since all the characters we've seen so far seem to have one ability (with the exception of Peter who can mimic the abilities of those around him) and Sylar has multiple, is it safe to assume that Sylar's somehow able to extract the abilites from his victim's brains and make them his?
It would explain the whole "save the cheerleader, save the world" slogan we've been hearing ad nauseum. If he could "kill" Claire the unkillable cheerleader...or at least render her immobile enough to steal her brain...then he himself would become invincible.
And that's probably the last thing anyone needs.