I think after 144Hz, you hit a point of really diminishing returns. Like is it possible in blind test to feel 240Hz vs 144Hz? It might give you in game like 1% advantage for +100% the costs.
- [0] testufo.com
The old 144hz goal was/is nice if you want to display 24fps (movies) content but games don't work like that. They display correctly without any judder/pulldown at whatever frame rate you want (as long as you have the hardware to run it at that rate)
Sounds like the beginning of a sales pitch for a 720 Hz display. :-)
If testufo was randomized with multiple repeating patterns and random offsets, it could be a much better test. Here you can accidentally bias yourself.
- https://www.youtube.com/watch?v=tV8P6T5tTYs - https://www.youtube.com/watch?v=OX31kZbAXsA
And here's how I can probably immediately convince you that I can as well: drag your cursor at a rapid speed across your screen back and forth (e.g. 2-3 times across the width per second). Focusing on one spot, do you see individual cursors with gaps of background in between? (I'm assuming yes.)
Now on 120 Hz the gaps will be half as big as on 60 Hz. On 240 Hz they are half as big once again, but they are nevertheless noticeable. The size of the gaps easily allows you to distinguish between 120 and 240 Hz.
Until I can drag my cursor across the screen and see nothing but a continuous moving object, we haven't hit diminishing returns on monitor refresh rate yet.