The Dish Network HD programing I had at 1080i seams worse to me than Roku's 720p.
My TV always displays 720p signal, doesn't matter I watch HD or SD from Netflix.
Also, Dish's SD channels were horrible on my SONY 46" LCD, where Roku's SD content
has very good quality: it's as good as I can't see any difference comparing to the HD.
Does Netflix broadcast everything at 720p?