Oops! You are totally wrong!
2k = 1920x1080
4k = 3840x2160
Now where does 2560x1440 fit? 3k? Sure. It sure af isn't 1.4k... I think you need to go back to remedial basic computer operation class at your local community college.
Yes, because resolution has everything to do with basic computer operation.
So next you're going to tell me that the Samsung Odyssey C49G95T is a 5k monitor instead of using the lowest denominator?
No one should really care about DCI when it comes to Display Resolutions on a PC, where the overall quality of the picture is decided, again by the lowest denominator.
But hey you do you, and also good job on acting as a grown up with your childish "get educated" stab. xD