One thing desktop displays desperately need is a way for each pixel to become brighter than its surrounding pixels at will. A lot brighter. Like, 50x brighter.

Dynamic brightness range is a necessary step for writing a 3D renderer that makes you feel like you're looking out a window. 256 levels of brightness aren't nearly enough.

We don't need the ability to specify that a pixel should be brightness level 64823 vs 64824. It doesn't need to be that fine-grained. What we need is the ability to overdrive the brightness of specific pixels. That way sunlight filtering through tree leaves will actually give the impression of sunlight filtering through tree leaves.