I'll tell you the answer upfront, its a race to online viewing for everything. But its not as nice of a future as it may seem to be.
The pioneers of this movement are the cord cutters and the online TV service providers. Some of the big choices right now are Netflix, Amazon, Hulu, Apple, Vudu, and
The result of this is the cord cutters have multiple devices or they forego certain services, all the while having to click dozens of buttons to switch from one type of service to another. They also have to check specialized websites to find where they can watch their shows, or flip from service to service and perform a dozen searches to find what they want to watch. And there are still certain shows they can't watch, even if they want to pay for them. This leads to some turning to piracy, 'borrowing' cable passwords from friends, or paying for questionable services which bypass regional black outs.
Why are they cutting the cord with all these hurdles? Some can't afford to pay for cable, others have reached a point where their cable bills are unjustifiably high, and others like the flexibility with cord cutting. If you aren't hooked on a particular show but just want TV to watch when you have time, you can get a $50 Roku box and a $9/mo netflix subscription and have thousands of TV shows, movies, kids shows all commercial free at the press of a button. Add an antenna for $20-40 and also get major networks for no monthly fee.
It use to be internet was a $10 - $15.00 add on to cable or phone packages. Now internet is a $50-80 add on. Soon internet service will be $100/mo and cable companies will be in a position to offer TV in any market for $30 as an add on to internet service. To get here cable companies need to also reduce what they are paying for TV.