Pros are wondering what the benefit of 4K is to them in terms of overall image quality, when mastered and delivered for 2K / 1080p. A lot of work is still shot in 1080p and cameras like the Canon C300 are the workhorses of the moment. In the case of the GH4 it may appear from the specs that it’s just an 8bit 4:2:0 camera internally. Actually the theory is…