I have worked on a series that was rejected on overseas sales (to the US) specifically because it was aquired on the Varicam, the reason being cited was the 720P format being too “low resolution” and the minimum being required for aquisition 1920×1080.
Frustrating after a lot of hard work and nice results. The footage was graded and mastered at 1080 and personally looked better than Sony HDCAM but there seems to be a specific requirement popping up that disallows 720P aquisition contractually by some broadcasters.
Sorry no specifics here