I use the Dell 43". It's not perfect but it's pretty great for the price: https://www.dell.com/en-us/work/shop/dell-43-ultra-hd-4k-mul...
It generally works as advertised, but sitting at distance one would normally site from a monitor (as demonstrated on Dell's marketing in the parent post), the extreme edges of the display aren't visible, because they're in the shadows of the bezel.
This is generally just a mild annoyance, but it can be workflow-impacting. For example, I use Ubuntu with the application launcher bar docked to the left side, which means that the dots indicating which application (and how many instances) are open is on the extreme left side of the display. I have to lean to my left in order to see these dots, because they aren't visible when I'm sitting upright and looking directly at the screen.
Also, while I've gotten used to it, sitting at a normal monitor distance involves a lot of vertical head movement.
Overall, I'm satisfied with what I got for the price, but I would have gotten the same 38" ultrawide that I use at home if I had the budget for it.