The difference is that the music industry was on it's knees. They practically HAD to go with anything that might bridge the way to new digital revenue streams. Apple's option "just worked". Ask them how happy they are TODAY to have put themselves so deeply under Apple's thumb and you'll better understand why many other players (like Amazon) get better pricing, etc from them. Now they are desperate to try to get out from under Apple's hold over their business.
The movie & TV and cable industries are not on their knees. And they've seen first hand what happens when you "help" Apple gain domination over a market. They have no intention of duplicating what happened to their music industry cousins.
Even if Apple can somehow get the production side to play ball, any Apple solution still depends on the distribution (broadband) pipe. Who owns that pipe? Aren't they also in the video distribution business? If you have an alternative option for broadband (you're lucky), aren't they also in the video distribution business? Why are the owners of the pipes going to allow Apple to take their lucrative subscription businesses when Apple's "magical" alternative will have to flow through those very same pipes?
The long-term missing rumor that makes all of this "new television model" go is some way to link Apple to us DIRECTLY. It won't fly while we have to depend on video on Apple servers having to reach us through broadband pipes owned by cable & communications companies who are also in the video subscription business.
Cable companies are losing audience big time. There is art lead one entire generation who would never subscribe ego cable on any large scale. Many of us use the cable company for the pipe coming into our homes and hat their contact delivery. Netflix is good but the user experience is horrible. Unless you know what you are looking for, you see the same few shows on screen.