...a finalized good 2K file is all you need. 4K's best asset is the ability to get perfect Down scaled/cropped 2K.
Well now that's good to know. 2K is UHD correct? Egg Born Son was saying the A7s was a good camera but also felt 1080p was fine and that a BMPCC was killer. I do confess that the latitude afforded me when shooting larger-than-needed images has helped me. I think some here will use this larger file to help with rolling shutter and for dolly shots, panning in post, that sort of thing. There must be a lot of G4/Sony/BMPC4K owners mixing footages on timelines trying to leverage these cameras and their respective traits....