Consider your reliance on google: - search - email - maps/navigation - youtube, news, your browser - possibly your phone OS, contacts, calendar
Google hasn't really done anything too overtly Orwellian (e.g. only promoting news that shows it in a good light). It even hasn't been too restrictive on interoperability (but neither was Microsoft, it just came pre-installed with IE).
So I suppose the question becomes "Should power be broken up preemptively?"
Or, perhaps politicians are rightly scared as they understand that they are losing political control to a technological system (they don't control) that increasingly has the power to shift public opinion (now that TV is dead).