This is probably another bullshit certification by VESA that does not account for e.g different performance at 60 or 120 Hz vs max refresh rate or lets manufacturers otherwise just advertise higher performance than is actually achievable just like they do with the MPRT stuff at the moment.
I applaud even an effort to standardize measurement of motion clarity. Even if it falls short (and the article does cover a reasonable amount about what’s measured) I think most monitors with poor motion response will leave this measurement off. So monitors with high motion clarity on say the UFO test would likely be good enough to bother getting and listing the certification. Would help separate the chaff when you see lots of “1ms” 144hz+ monitors that are still blur fests.