Do computer displays 'refresh'? I thought that went away with CRTs. If an LCD monitor is showing a static image, the pixels just sit there and do not change state or flicker.
I agree that E-ink is easier to read, perhaps because it's a passive display using ambient light rather than a backlight (which may indeed flicker at a certain frequency). It's a pity that no common GUI has a usable option for white text on a black background, except in terminal windows.