Emanuel
Cross-Examiner
I've seen excellent results from a 2K transfer (originated digitally, I mean sub-$20K digital shot).(...)
Because otherwise, finishing in 2K gives you enough even for the big screen.
(...)
This short blown up to the 35mm KODAK film:
http://www.vimeo.com/2631140
BTS:
http://www.vimeo.com/3633978
I could find some differences between the 110fps-120fps 2K footage from the 4K. The average Joe won't go so far but there's a distinct level of resolution on the screen.
I believe you can find the same between RED 4K and 5D MKII 1080p -- that's why you never should cut different sources into the same scene (rule#1 even @scriptwriting ;-). Even if, I'd rather hope that you can not to notice them between REDCODE36 and h.264 45Mb/s (5D MKII). May David bring some educated guess on this.