I know the cameras that indie films use are nothing like those Lucas used. The camera cost would exceed their budget. My point was what you refered to in what digital has done for low budget film making.
In regards to your example Superman Returns and my example 300 (like I said I know nothing on the topic) I was under the impression that digital was choosen for filming because of extensive post production work/green screen, a myth you dispelled in your post chalking it up to producers and marketing. Which is why I though 300 may have been shot digitally.
With this in mind in your opinon why did Singer shoot SR digitally?