The last straw for me was watching "Inglourious Basterds" on AMC, I think it was. It took them four hours to show the movie because they had nearly an hour and a half of commercials in between. To add insult to injury, they even cut out or censored key parts of the movie!
That's one night of my life I'll never get back.
I basically stick to Netflix now. Either through my MacBook Pro (phenomenal picture) or through my Roku when I want it on the TV. Sure, your choices are limited on Netflix with respect to movies but most of the popular TV series are on there and you can watch them at your leisure. So what if they are a season behind. I'm still working my way through "Lost" even though it left the air years ago.
Even if you wait a month to finish an episode of say, "Breaking Bad" - it will be sitting for you right where you left off. And if you want to go back to the beginning to see the episode or entire season once again - go for it!
On demand is the way to go and if cable TV doesn't change their business model, they will eventually go the way of the record industry - which is now owned by Apple, Google and Amazon.
I have 2 Roku 3's now. They are AWESOME!