Well, simple, they will be one of our (major) internet providers as what they are now building and testing in Kansas.
All of our web browsing histories will be exploited. Once we are connected to the internet, they will notice us instantly. There will be no privacy at all. Then, they will use our information for the sake of Google’s interests (as what they have been doing before they got caught).
Don’t be evil, my *ss!
There is one other side of this move. It will spur Comcast and the likes to upgrade their speed.