NY_Dan
Well-known
This is everything to do with the technology and the quality of single frames pulled from video, but if that quality was indistinguishable from a stills camera how would you know how it was shot.
Well, I believe one of the OP's points is that high res video can make almost anyone capable of producing great street photos -- the premise being that with the camera constantly on something good will be captured, or at the very least, the photographer will not have to choose a perfect/decisive moment to shoot.
Now some have opined that the camera won't be on continuously but only for 2-3 second bursts -- well then, a motor drive still camera would achieve the same result. To use a 4K camera as a still camera is possible, but then why not just use a still with a motor drive. I agree, one can't always tell what recoding medium was used to make an image.