Pay TV is not a necessity. There is still DirecTV, Dish Network, and whatever the phone company is pushing for TV over their lines. Or even OTA with a good antenna. So personally I wouldn't call it a monopoly. There is still Internet through the phone companies or, even worse, Hughes Net.
But yeah, I'd like to see the DOJ crawl up Comcast and TWC's asses like they did to Siruis and SM during their merger.