Thats what I did, though I came to the conclusion that there probably wouldn't be an affordable 27" replacement forthcoming a while ago and took the plunge.Ok then! I've been ready to replace my late-2014 iMac 27" for a while. I want to be able to use the latest macOS features and upgrade to an Apple Silicon desktop computer.
The Studio Mac and new monitor all look great but are just more than I need or want to spend.
So 24" iMac it is! It will work just fine for me, and it's considerably more affordable as well. I would prefer the option of more RAM perhaps, but realistically it is not needed. Most difficult decision now is what color to select . . .
The reality is that the M1 is SO powerful (we are tending to forget this with all the attention on the way-overpowered for average consumer Pro, Max, and Ultra variants) that its all you could need for a long time to come.
The 24 is great - and you really wont notice the loss of 3" of screen.
My other thought was that given Apples pricing.... IF they ever did release a '30" iMac' it would almost certainly be a replacement for the deceased iMacPRO and not be aimed at consumers any more AND have a +£2,000 price tag to match.
Seems to me that the studio and studio display are definitely aimed at the pro market and replacing the iMac Pro for sure.
Enjoy your 24" iMac... you'll love it
Lots of colour choice - my only complaint is that most of us have an iMac against a wall so never really get to appreciate the colour choice once its out the box and on the desk.