We'll know for sure later today, but this sounds pretty cool - 99 cent TV show rentals through iTunes:
As part of the Apple event Wednesday, News Corp.’s Fox and Walt Disney’s ABC networks are slated to be announced as offering 99-cent rentals of television shows through the iTunes store, according to people familiar with the matter.
TV isn't like music. With songs, I want to listen to stuff I like again. With TV, it's rare that I want to see the same episode again. Once I've seen it, I'm done - so buying an episode, or even a boxed DVD set, just doesn't make that much sense to me. Renting, on the other hand? Sure, especially for an episode I've missed, or for a show I'm wondering about.
Add in an inexpensive set top box, which is also supposed to be part of the plan - and it looks pretty good. Especially with Netflix coming to the AppleTV.