Last month I attended an event hosted by the LA Post Production Group. Speaking was Michael Cioni from LightIron Digital about file-based workflows (RED, Alexa, DSLR, etc.) and image resolution. What I took away from the presentation is the robustness of REDCODE for both resolution and color space, especially compared to DSLR's (paltry in comparison) HD resolution and lower color bit-depth.
At one point someone asked about Michael's iPad controlling the Keynote presentation and he shared a little nugget about using iPad in film production. They are using a pair of 64 GB iPads in Mel Gibson's latest feature to screen footage.
As they pull files off the (seven or so) cameras they are converted for iPad playback. These dailies (should they be called hourlies?) are organized by scene in iPhoto and copied to alternate iPads which are swapped throughout the day for Gibson's review. Michael indicated the screen size and battery life is ideal and 64 GB of storage is enough for the entire feature.