While I totally see that there are usecases of Hz modes matching 24fps and 25fps footage,
there is no sane usescase popping into my mind for 64Hz.
60Hz is great though since 30fps sort of became a new standard over time, meaning footage became more optimized for internet than TV.
At consumer level 24fps and 25fps may still exist as they offer better brightness in darker enviroments when recording eg. with smart phones compared to 30fps.
But considering the improvements of mobile recording I will only be a matter of time when 24 and 25 are history. Dealing with 30fps is a much easier value to be compatible with alomst any devices.
This is btw the only reason for 144z monitors (6x24) which has proven to be surpassed by now as 120 works just as good and even 240Hz models are out there. This also kind of previews the desire of getting a 30fps for videos in the future. Admitted I can not prove it scientificially but I seems obvious to me.