I don't know if it is directly derived from CPDLC data, but there is a great display on the Flow Management desk at LACC. It shows the North Atlantic, and is populated with lots of arrows in different colours. These are symbols for each aircraft crossing the Atlantic, and you can interrogate the symbols for FPL and altitude data. When the core Oceanic flow is happening, it is the best grphical display of the track structure in practice.