Go big or go home.

Further to my note about the sheer awesomeness of The Dark Knight in IMAX, check out this fascinating interview with editor Lee Smith for the Editors' Guild.  Some is a little/a lot technical for the uninitiated, but it provides lots of great info on how the movie incorporated both IMAX 70mm film, VistaVision footage (VistaVision is a format that runs the film horizontally, like IMAX, but uwith a smaller camera, giving a higher resolution image with less grain than standard anamorphic or Super 35 shooting techniques.  It was used for entire films for a time, including White Christmas and Vertigo, but now is only pulled out every once in a while for special effects shots, as the lack of grain makes up for the multiple generations used to composite effects), and standard 35.

Especially interesting, to me anyway, is Smith's remark that the switching aspect ratios in the IMAX version were jarring on the first test, until they projected it on a big screen, when it became apparent that it would often be noticed only subconsciously as viewers would be looking at the middle of the screen.  That was my experience, and I was actively paying attention to the aspect ratios to see when it changed - a few times I missed the change.

The Blu-Ray version will reportedly contain this aspect-shifting version.