I can see much difference between 60-100hz, but not much between 100-144. But
I can see difference between 100-200hz. But, it is useless running a movie
with 100hz. So, you GPU must support more that 60hz, and if you want to the
flawness, al your media must make same FPS as your Hz. If your media runs at
60fps, more Hz it is useless, you will se no difference. If your media runs
120hz, and monitor runs on 60hz, you will see no difference. To see the
difference, you must to run your media at the same number of FPS like your
monitor Hz.
Example:
For 200hz -> 200fps
For 200fps -> 200hz
For 100fps -> 100hz
For 100hz -> 100fps
For 60hz -> 60fps
For 60fps -> 60hz
Some numbers more that other ones, are useless.
If the numbers are the same, you will see the difference.