The "new" iMac is just another boring rehash of the 2004 iMac G5. Just thinner, way more power and a somewhat bigger screen.
24" is way too small for 2021. 27" is the standard for screen size on a desktop computer today. Heck, I run a 49" and starting to feel I need more space.
In the early days, the iMac really pushed the limits on what a "simple" AIO could be, now, not so much. When the iMac G5 launched with 17" or 20" screens, most people sat behind awful 15" or maybe 17" CRTs. Now, even cheap crap PCs can be had with a 27" screen at an affordable price.
The iMac G5 got flak for not having height adjustable screen as the iMac G4 did and now, 17 years later, Apple still hasn't fixed that. We know they can (looking at you expensive Pro Display XDR stand), they just don't want to.
The part of the computer that you will be looking at the whole time you use it is not at all pretty. That chin looks awful without the Apple logo and a white bezel is a really strange decision. The colours are meh, at best, embarrassing at worst. Brings back memories when I got my gf an orange iBook G3. When she used that on her commute, she got so many comments about it in the line of "oh, I see you are using one of those new girl computers". Kitting a full classroom with 25-30 new iMacs will make the room look like a scene out of a Japanese cartoon.
I really hope there will be a new "iMac Pro" looking a bit more "Pro", but I doubt it.