I'm not convinced, I think it depends on what type of images you are processing. If you ever do what I would describe as serious architectural photography, where angles and alignment are critical, I think it would be hard to achieve perfection. When the processed image was later seen on a flat screen or on a print, it might then be apparent that it is not perfect.
I still prefer multiple monitors to better organize windows whereas one single monitor makes window management a little more difficult (IMO). Tools like Magnet definitely will help, but i'm not sold on single monitors and especially these curved ones. They still feel more gimmicky than beneficial.
I am using a 35 inch curved monitor. It takes some getting use to. But I find there are advantages and disadvantages. Having to keep a high resolution causes the lettering on my Elements 2020 to be very small. The wide width makes is useful for having more than one photo on the screen at the same time. I would reccomend a 32 inch monitor. My wife has one and loves it.