Screenshots are impossible due to it seeming to be hardware and not software.
It looks a lot like the image is dragging, or almost ghosting. For example, go into the app drawer and drag through the apps. Don't flick, but drag up and down at varying speeds. The words seems to trail with a ghosting outline almost. When also using the standard clock that shifts between white and grey during the day, moving left and right will cause some ghosting on the numbers.
Finally in games like Clash of Clans, it just feels blurry when moving everything around. My M7 did this, just not so prominent. And my G2 doesn't do this at all.
I've replaced out 3 M8's all with the same screen blur, and went to VZW and their floors models do it too. For such praise behind the screen, how is this not a negative?