It is likely that the 1080p VOD movies that Dish is putting out are higher bandwidth than the current 1080i programming.
Even if your television performed perfect 3:2 reverse pulldown on a 1080i source, the higher bandwidth 1080p will look better.
Dish has to buffer the movies on your harddrive because these movies are higher bandwidth than any of the current 1080i HD PPV channels. Otherwise, Dish could get away with performing 3:2 reverse pulldown on any of their current 1080i HD channels and calling it "1080p".
Even if your television performed perfect 3:2 reverse pulldown on a 1080i source, the higher bandwidth 1080p will look better.
Dish has to buffer the movies on your harddrive because these movies are higher bandwidth than any of the current 1080i HD PPV channels. Otherwise, Dish could get away with performing 3:2 reverse pulldown on any of their current 1080i HD channels and calling it "1080p".