Nothing. Until the time that it is evolving with the way how people wants to connect socially. And Facebook does a good job at it by hiring visionaries, gettin

Nothing. Until the time that it is evolving with the way how people wants to connect socially. And Facebook does a good job at it by hiring visionaries, getting people with a good common sense and attracting talents whom they know would be excited being part of a technical social revolution. Nonetheless, the only thing that could probably kill Facebook is when people stop using it. Simple as that.