Appears flat here as well, however, some of the dell monitors have this weird checkerboard-like pattern in their backlight distribution, so large surfaces are n

Appears flat here as well, however, some of the dell monitors have this weird checkerboard-like pattern in their backlight distribution, so large surfaces are not plain to look at, you see "through" the plane and onto the background pattern of the screen itself, which is physically located behind the LCD. I've noticed a 3D-like effect from boxes of bright singular colors many time on my dell monitor at work, especially when they're smallish boxes on dark background, the boxes look like they have depth. I speculate this happens because my eye is focusing on the checkerboard pattern on the back of the monitor itself, which is behind the lcd, and probably far enough behind it (several millimeters) that depth perception kicks in.