Wired recently published an excellent article on the “Dark Knight“. It's a must-read for anyone who's a fan of Batman, the film's director, Christopher Nolan, or just doing things the old fashioned way.
I wanted to highlight was a particularly interesting segment from Wally Pfister, the film's director of photography. He explains the relevance of using huge Imax film stock in the days of 1080p televisions and digital compression.
It's more of a visceral thing. You can see something way off on the horizon. You can see a little glint of light, a reflection in Batman's eye. You can't see it in a conventional theater. And you definitely can't see it on a plasma screen at home.
Only a handful of the Dark Knight's scenes were shot with Imax film and cameras, but I'm looking forward to them all the same.
The imax format is 70mm (or 65mm). I think you are trying to compare with 35mm perhaps?