A lot of display hardware uses a combination of spatial and temporal dithering these days. You can see it sometimes if you look up close, it appears as very faint flickering "snow" (the kind you'd see on old analog TV). Ironically, making this kind of dithering even less perceivable may turn out to be the foremost benefit of high pixel resolutions (beyond 1080p) and refresh rates (beyond 120Hz) since it seems that raising those specs is easier than directly improving color depth in hardware.