I just wonder: how much a difference is there between 1080P24 and 720P24 when it comes to bitrate? Is 1080 twice the data that 720 is? (2 megapixels vs. 1 megapixel)
Note: The data rates shown are in MegaBytes per second, and are the exact data rates from .mov QuickTime files with 1 stereo audio track at 48khz 16bit, exported in each format out of FCP.
I also made an Excel calculator based on these data rates.