The 5k display is what keeps me on 27” iMac. It is simply the best display I have ever used. I love everything about it - size, resolution, DPI.
I tried a mini with my other displays I use with Linux/Windows boxes. LG 2560x1080 21:9 25”, LG 3840x2160 16:10 24” and Acer Predator X34P 21:9 34” curved 3440x1440P. All displays had sleep/wake issues and Apple support acknowledged this inviting me to return the mini for refund as they had no solution. Aside from this I could not live with the 110PPI having got used to highDPI.
I had a look at the iMac 24” and found the display just too much of a compromise from the 27”. I decided I would rather pay a premium to have a replacement of the 27” than compromise to a 24” or a mini with third party display (and all the hassles that brought me at least).
I hope for a 27” replacement with >=5K, ideally more CPU/GPU cores in tweaked M1, 16GB fine for me though option for 32GB would be nice. Connectivity of 24“ would be enough - as long as there is at least one TB4 I can connect to an external hub if needed then I am happy enough!
Fingers crossed …