In the 90s I was tasked with fixing our CEOs computer and entered his office to see the largest CRT I’ve ever seen in my life. (It was not a PVM-4300, though. This one was sat on a metal table.) The size of it was shocking. I was more shocked, however, to find out he used it at 640 x 480. I never saw him use it so maybe he played games on it… from the moon.

The Sony FW900 was the peak of desktop CRT monitors, and it came out in 1999 so it or one of its rebadges might have been what you saw. That was much smaller than the PVM-4300 at 24" but with a much higher max resolution of 2304x1440@85hz, roughly what we'd now call 1440p, about eight years before the first 1080p LCDs arrived.

Those were still sought after well into the LCD era for their high resolution and incredible motion clarity, but I think LCDs getting "good enough" and the arrival of OLED monitors with near-zero response times has finally put them out to pasture as anything but a collectors item.