However, I believe the New Model does represent the first ever proposal for an ATC tool where the system is expected to calculate the complete traffic solution.
I am sure I saw such a system at Bretigny Sur Orge in the mid 1990s. EURO ATC2000 or something it was called. Looked very impressive handling a traffic sample which was 400% higher than the maximum experienced in the demonstrated sector at the time. It was all a bit last minute though with all executions left to the last possible minute to ensure that the data it was number crunching was the most accurate and efficient possible. It had lots of climbs and descents to achieve separation rather than vectoring. There was also an Airbus sim next door where pilots 'flew' in the trial using datalink to receive their clearances.
I guess they must have found insurmountable difficulties since I have never heard anything more about the project.