VIEWING ANGLES - PICTURE DETAIL
The U2868PQU has a horizontal viewing angle of 170 degrees and as you can see it's not half bad for a TN panel.
On the other hand although the vertical viewing angle is set at 160 degrees and from above the picture is quite good the same doesn't apply when you're looking from bellow. This should not affect most people since chances are you will be staring the screen head on but still we did find it strange.
We played several games with the U2868PQU to check its response time and input lag and although the results were quite good we did have slight lag problems when playing fast passed FPS titles like Planetside 2.
4k resolution however has its perks and if the game you're playing supports it you will also get more detail like we did with for example Planetside 2 (top screenshots are with a resolution of 3840x2160 while the bottom ones are with a resolution of 2560x1600).
We also used the alpha of Star Citizen and although detail is roughly the same you do see a good difference in sharpness even when comparing 2160p with 1600p.