My boss says he received a complaint from the syndicator of a major show produced in Hollywood about the way their show looks on our station in Los Angeles. They complained that the blacks were slightly compressed and the chroma a little oversaturated.
The show is fed to us via satellite. One of our engineers says he sees a difference in levels between one area of the station and another. Oh-oh. My boss is going to check the path from the output of the sat receiver to the ingest point using good ol' color bars. I hope he realizes that he's dealing with a digital bit stream. Unlike analog, there would have to be a device in the path to decode that bit stream, alter the video levels and re-encode to digital.
I caught a glimpse of color bars from the uplink facility and they looked OK. I said not to rule out playback issues at the uplink facility.
My boss wants to fix this problem before the syndicator goes to station management with his complaint.
So you see, color bars still have usefulness in 2020.