I spent my lunch searching for any movie on Netflix that I have on BRD at home - not a single match. I get that they don't have the latest movies on Netflix, but even an old one like iRobot was not available. I wonder if it's a studio issue?
In any case I started watching U-571 just because, and I do notice significant video artifact. Banding in the underwater scenes is quite prominent, but I can't know if this is due to source material or introduced by the streaming signal. Audio sounds reasonable without having critically listened to it.
