Senti... There's a much improvement from 1080HD to 4x 2160UHD, there's no doubt on it (a proposito, I did this comparison Yesterday night on two TV sets with native footage, respectively). On big screen, I've always gotten the difference, night and day on wides, since the beginning when RED delivered it for first time 8 years ago*. So please, let's not try to match tangerines with melons. As second thought, delivery has nothing to do with acquisition. Your SD copy from 4K or 8K capture will really shine much more "natural" when you just accept it as a simple truth à la Palice : D Sharp pictures comprehends softer samples whenever you want. Softness hardly the higher. I was used to this usual mistake when in the early 90s, my video dealer was often trying to convince me that a VHS tape from video recording would equal the 260 lines of a hollywood blockbuster when downsampled. Nyquist is mandatory reading, amico mio! :-) - E. *PS: Never had the chance to watch anything from Dalsa... It just depends on the application as you well know... One thing is a f/1.8 close up, another one a really wide blue sky at noon or sunset... ;-)