I'm half convinced most anons sit too far from their 16:9 screens anyway, so the extra width of ultrawides is less useful than you''d think as by definition they need to be further from your face to fall fully within your vision cone.
Consider the following;
>https://www.ecoustics.com/articles/optimal-hdtv-size-viewing-distances/
>https://carltonbale.com/home-theater/home-theater-calculator/
I would first make sure your current screen is the correct distance from your seated position and then assess from there.