Analogue vs Digital
I listened to an interview in a podcast with John Seale (DP on the new Mad Max film), and that was his first time shooting digitally.
He made the comment that it's possible to process the images in such a way that a typical viewer couldn't tell the whether it originated on celluloid or not. Therefore he doesn't see any advantage to shooting on film, and doesn't plan on doing so again.
Given Seale's background, I'd be inclined to go with his opinion. :)
The Zacuto tests last year (I think) included film as well as digital. Whilst it's got aesthetically pleasing characteristics, the latitude is lower. I can't remember the findings on resolution, but I've got a feeling that a 4K camera is pretty close.