If I look at them at a shallow angle, any bright line of pixels at the very edge of the screen fades out (video). This isn't due to their regular "viewing angle" specification since at the angles the line disappear, the rest of the image is still clearly visible.
Here I demonstrate it with the application indicators of Windows 10, but the same happens at the other edges of either screen, as long as it is a bright line at the very edge.
This clearly impeccably realistic computer simulation
that I certainly did not make in under 5 minutes of a screen shows that I would expect the only thing to hide the very edge of pixels to be the actual bezel of the display.
So why does it disappear when there is no physical obstruction?
Update: Here is another video that shows the fading over a plain bright surface so we can see the "falloff":