I admit I see both sides of this now (no pun intended). When I did sit closer with the CRG9 I did have to turn my head a bit more and with the curve that did, kind of, create an almost VR experience, and as I used to game in 3D I appreciated that. However, I really enjoy just being able to sit in front of the screen and take it all in and let immersion create the illusion.
I've gotten accustomed to the 42" size of the C2 but still feel that 32-38" is the sweet spot for 4K if sitting very close to it. I often sit back about 4 feet from it and I'm mostly comfortable there, but will still lean in to glean those extra details. However, as contradictory as it sounds, I'd be interested in a 38" curved UW4K OLED. Just big enough to give that peripheral experience but not so much as to leave me missing something if I was too tired to look around. However, that is a mostly moot point since even an OC'd 4090 is going to have a hard time with that with the games I play.