Interesting that yu brought up depth. When I was watching some of the "in-cab" shots, and Foxx and Cruise were both in the shot and LA was the back drop I thought "wow, this shot looks as if it's got an infinite amount of depth and it goes on forever." Even though, the a great deal of the city was in focus, it still gave off an incredible amount of depth because of how everything was staged and blocked and I'm guessing the width of the lens.
P.S. I believe the only shots that were on film were in the club Fever and possible on the train/subway as they green screened a bunch of scenes in that setting.