...the best you'll see in 3D for some time to come remains in the realm of traditional and CGI animation. For live action films, even comic book films, it might not present the best quality that theatrical presentation can achieve and Nolan is correct in pointing that out... but will audiences listen or just keep gorging on the eye-candy?
If you happen to be on the fence about purchasing the Blu-ray due to the potential for a double-dip, you’d be missing out on a great addition to your high-def library; however, it would certainly be understandable as the features for The Dark Knight leave quite a bit to be desired for such a landmark film. That said, the video and audio on the Blu-ray disc more than make up for the lack of features and make The Dark Knight, already a great film in whatever format you happen to view it, a great way to show off your hi-def system.