Well, it at least suggests that you can get better detail while maintaining the same noise performance of one of the greatest low-light sensors ever created.
But yeah, it is just one scenario out of essentially infinite scenarios. More importantly, it is a little better than the previous generation high resolution sensor in virtually all respects.
Speaking of scenarios, turn on the lights and set the D850 to iso64 and run the comparison again. You may notice some improvements over the 6-year-old D4 sensor.
I guess the overarching theme is that it is versatile.