If you simply wish to do some general work, then the 24 inch iMac can make a better case for itself due to its new visuals, efficiency with the M1 chip, upgrades in SSD and internet usage, and much more. There is also a more moderate pricing along with a good quality screen of about 4.5K. On the other hand, should you need more complex operations, perhaps enhanced graphics or CPU are of concern, then the 27 inch model still can be considered or wait for the anticipated larger M1X iMacs which are said to perform even better.