I really can't see Apple getting more content at the same price as Netflix, or the same content at a lower price.
Granted Netflix can't sustain their pricing model forever, but Apple doesn't have many instances of making "better" and "cheaper" at the same time.
Netflix streaming content isn't that great. I subscribe, and I am happy for what is does, but it is more notable for what it does not. It wouldn't be that hard for Apple to duplicate the current Netflix streaming library, and offer that as a subscription as Netflix does. The big win for Apple is that they could ADDITIONALLY provide spontaneous limited-time downloads of new stuff on a pay-per-view basis.
Now, I know some of you would respond: "well, for $2 more per month I can get 1 DVD out at a time, which lets me watch XXX movies per month." Yes, that works for some people, but this requires a good deal of planning-- managing your queue, mailing and so forth. In my case, as I'm sure it is with many others, i have a family--wife, kids-- and I don't know exactly what my plan will be for the next few weeks. My personal Netflix DVD queue has a lot of Sci-Fi, but if I'm watching with my wife, we might go for a romantic comedy. Or we might just make a last minute decision to go out and skip the movie altogether. So a service that allows for more spontaneity than Netflix, at a few dollars more per month, would have massive appeal.