I doubt it, the model for "selling" movies via the Internet doesn't really make much sense. It's one thing to sell throwaway 5Mb $1 music files, it's another to sell 5Gb $10-20 "movies", with limited ability to back them up, and where the preferred medium for viewing is a 32"+ display.
A more likely model is a subscription service, where you'll have access to any movies you want on an unlimited viewing basis for a per-monthly fee. This fits more easily into Apple's "just works" model as there's no need to transfer movie files from one system to another or make back-ups. The user only needs cached local copies, which can be managed by the system.
For most people, a subscription to a service offering every movie ever made digitally available is a superior option to trying to build a library from DVDs or (*shudder*) Blu-ray discs. I'm a big DVD collector, and probably would have done the same with a "just works" HD media system, but given the choice, I'd rather pay $15 a month and watch whatever I want when I want rather than just watch the movies I've already bought from a store.
I suspect, in the end, that's the direction Apple will head for, and I suspect you'll like it better than a "buy" option.