Hmm I dunno, I am an ex LG Flatron + Mitrubishi Diamondtron dual CRT user for many years and this QD-OLED is the first time in all these decades nearly of owning multitudes of LCD panels from many brands where I have felt like I am back to those CRT days but now with superior features in all areas. Maybe the resolution scaling and absolute motion isn't quite there yet, but you'd be absolutely crazy to pick a CRT, even a good CRT over a QD-OLED based monitor, although granted there is only one such model out currently and there's still a little bit of a queue to get one.
Plus, remember that CRTs shift colours over time so will get less and less accurate as time goes on. I worked in a photo studio for a few years where we edited on Eizo 21" CRTs for their colour accuracy, but they needed recalibration every 6 months because of the constant use resulting in obvious colour ageing. LCDs don't have this issue thanks to an LED backlight, and QD-OLED is still too new but I cannot see it being any different to LED backlit LCD either given QD-OLED's shelf life benefits thanks to the nature of the QD side of things. and with there not being a white layer.