I've been using a 34" 1440p curved ultrawide monitor (21:9) since 2020 and it's been amazing. Earlier this year I decided to try using a 42" LG OLED TV as my monitor and lasted about a day before deciding to go back. I 100% agree with you RE: viewing the corners of the flat screen. I'll never go back to a flat monitor/TV for my primary PC again. I think my ideal monitor is ultrawide, curved, 1440p, OLED, and 38" or so.