Every now and then, I get a hankering for one of those huge Planar medical grayscale LCDs they use for displaying X-ray images. You can pick them up cheap, but alas they require a matching proprietary video card to drive them. Some ridiculous resolution like 2300x1600 @ 23" and presumably better than average gray distinction.

In principle you could get more shades of grey if instead of feeding a grayscale monitor conventionally you combined the outputs of all three D/As via a resistor network (or some other method) but you'd have to write a custom driver to make a sensible grayscale palette out of it.

Click to expand...

Interesting thought. I wonder if the "driver" side of things could be taken care of in one of the FPGA/CPLD based panel driver boards from Chinese ebay sellers.