That's true. IIRC someone in this thread mentioned that would be a problem for Season Four of Enterprise, which was shot digitally.
Yep, the last season of ENT was shot digitally, if the resolution it was shot at was 1920 x 1080 (which seems likely in 2004), then that's it, there's no more information then that, whereas 35mm film would probably max out at around 4k. What I mean by that is, when the extra detail you're capturing is nothing more than film grain, you've reached the maximum resolution of the film.