terry4536 :
I have a UHD 4k TV. It has a great picture. But when I started looking for 4K video I tried 4K Netflix. There were some very small touches that you could discern the extra resolution. But I decided it wasn't worth the extra Netflix cost and I went back to 1080P Netflix. My point being that you will not notice the difference between 1080P and 2K.
That's a pretty big generalization based on your specific experience, that ignores important variables like screen size and viewing distance. Furthermore, not all 4K video is the same as it depends on what bit rate was used when encoding it (which isn't an factor for gaming).