Unfortunately for big cable, pretty soon they'll be swimming in competition
Rolling out DOCSIS 3.1 will be great for people wanting to get streaming packages like Sling TV or Directv Now. The only thing that will stop them will be too-small caps, but it will be difficult to justify a 200 GB cap when you are selling people a gigabit a second that could run through the entire cap in a half hour.
One of the big reasons why those streaming packages saves money is, surprise surprise, not having to rent boxes but instead using those you own. I suspect cable will eventually be forced to go along with that, though they'll probably try to replace that revenue via "per TV" type fees at first.
Big cable is going to be squeezed on the other side by cellular providers who will use LTE-A and 5G to offer fixed wireless internet at a gigabit and undercut cable since they won't have to deal with franchise agreements or running wires to everyone's home. Plus AT&T has AirGig, which looks like very interesting technology for making it far cheaper to backhaul multi-gigabit connections to rural towers in remote locations.