There are 4k 144hz monitors on amazon but I can't afford any of them.
With a 1ms response time, I should theoretically be able to create the custom resolution of 1920x1080 at 960Hz using the Nvidia control panel.
On my Acer 1080p 240hz monitor, I was able to get 720x576 at 480hz.
Using the Blur Busters UFO test, the difference between 480hz and 240hz was clear to me and even my little sister who is in 5th grade.
The motion blur on my 240hz monitor is still very noticeable with the test below.
With the "Video Speed Controller" chrome extension, I speed up videos with dialogue and CC from 2.5x to 8x, and up to 16x for videos with little to no dialogue.
Here's some simple equations to explain why I need a 4k 240hz monitor:
3840x2160*240=1920x1080*960 [Theoretically 4k 240hz sends the same quantity of information as 1080p 960hz]
4k 240hz mode:
(30 fps video)*(8x speed)=240 fps
(60 fps video)*(4x speed)=240 fps
1920x1080 960hz mode:
(30 fps video)*(32x speed)=960 fps
(60 fps video)*(16x speed)=960 fps