According to analyst Ming-Chi Kuo (who has a somewhat reputable track record), Apple is set to release a 32-inch iMac with a Mini-LED display in 2025. This is in addition to a rumored refresh of the 24-inch iMac, which is expected to launch sometime next year. https://www.notebookcheck.net/New-iMac-with-32-inch-Mini-LED-display-rumored-to-launch-in-2025.760563.0.html
I'd like to see them go 16:10 or even 3:2.