playing many times on pc with curved monitor and iam sure of one thing, it wasnt worst than flat one. Maybe even better never think about it while playing. But if curved monitor made any problems i would remmember that, so i think its worth to buy.
single wide screeen curved is a nice plus when compared to multi-monitor use as you do not have to deal with any bezels at all. This is of course only if your gaming across all monitors together. Another improvement of course all depending on the setup differences between the multi monitor and single monitor is that it can be less strain on your GPU. Or for the same strain to run the multi monitors, that effor can be put towards higher resolutions on the single. I currently have both a flat and a curved on different systems and for the most part actual display difference isnt drastic enough to really make a difference.
One plus for curved monitors is you can slightly push them back further if your monitor is in a corner setup of your room.
I have dual curved 32's. I really like them. I was kicking around the idea of the curved 38 that Alienware has but I'm not convinced it's the way to go. Not a fan of games having to be stretched to fit the screen. Very few games actually support ultrawide. Even Apex that supports ultrawide as a stretched image in the corners.