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Ryotsu said:

It sounds to me that TVs or computer monitors are at 60/120/144 Hz, but I have seen TV 4k at 600 and 1200Hz of fluidity, How is that?

I am guessing you was looking at a Samsung TV and while it might say HZ on spec sheet, it really being calculated by Samsung CMR formula which uses 

Frame Refresh Rate

Image Processor speed

Backlight technology 

to come up with the number.  

https://www.samsung.com/ca/support/tv-audio-video/what-is-cmr-clear-motion-rate/

So that 1200hz is calculated completely different then the number other tvs are using.