It would make absolutely no sense for them to buy Netflix only to cut out the vast majority of Netflix users by making it only available on Apple's own platforms.
In the primarily mail-dvd days, they were like the awesome video store that has everything; netflix online only has a (admittedly large) handful of titles, with ever more emphasis on the ever increasing quantity of self-produced titles...
While I was once very pro-netflix as a consumer, imagning one day that I'd be able to watch anything at all ever produced with a low subscription - I'm more ambivalent now imagining the future when the dvd rentals (and associated vast library) are dropped entirely and never digitized..