IBM had a CRT version of this before then. It worked the same by splitting the display into four quadrants. A Windows desktop only showed on one quadrant and yo

IBM had a CRT version of this before then. It worked the same by splitting the display into four quadrants. A Windows desktop only showed on one quadrant and you needed special software to use the whole display. The one we had at work was monochrome grayscale so it lacked the issues of dealing with a fine shadow mask. LCD panels in that era were still being hand buffed and the defect rate would be high when attempting higher resolutions.