It's not so much that a 5k, 27" iMac would be useless - it's just a "niche" that is being squeezed in multiple directions.No, they don't. Anyone "needing" a 27-inch iMac is just as served by the pairing of a Studio Display and any other desktop Mac, ranging from a base model M2 Mac mini to a maxed out M2 Ultra Mac Studio/Pro. No one "NEEDS" a 27-inch all-in-one that isn't served just as well by that combination.
- Some users (like me) prefer a separates system and only bought iMac in the past because there was no viable alternative. People want to update displays and processors independently, or explore non-Apple display options. Even Apple devotees now have a choice of the Studio Display or Pro XDR, and this thread is full of people wanting different sized displays on their iMac.
- The 24" is now more powerful and has a better screen than the old 21.5" iMac, which will take some potential sales away from a new 5k.
- The market is moving away from desktops in general. Moreover, while there used to be a big performance gap between Intel MacBooks and iMacs with their desktop-class chips, with Apple Silicon everything below the ultra uses the same chips for desktop and laptop, and delivers much the same performance. That's another bunch of 5k iMac customers gone (and the Studio Display is clearly designed as a MacBook docking station).
- Right now, there doesn't seem to be anything better on offer than a slightly brighter version of the 5/10-year-old 5k panel to put in a new iMac at a remotely affordable price. Also, nobody outside Apple has really taken up the 5k@27" format (have the 5k displays Samsung et. al. announced 6 months ago appeared yet?) so they probably are quite expensive.
Very true of the higher-end i9 iMac configurations - even the base Studio is getting into iMax Pro territory. In fact, the US$ price of a Mac Studio + full GPU/Studio Display combo is suspiciously the same as a top-end i9 5k iMac with the same RAM and Storage.... do you believe in coincidences? And, yeah, the option to add cheap 3rd party RAM to the iMac was never likely to make the jump to Apple Silicon.Price out any Mac Studio configuration and the price point would've been similar to a 2020 27-inch iMac priced out with that same RAM amount, worse graphics, and a worse CPU.
However, there really isn't an equivalent of the old $1800-$2000 i5 5k iMacs for people who just like a nice big, clear screen to do less-demanding work.
Well, it's a little box and a second mains power lead. Maybe the much anticipated 3nm M3 will draw less power Apple can make a Thunderbolt-powered Mini.M1 iMacs already exist. Because you can't tolerate a small little box hanging off of your display, your only option is a 24-inch model.
Of course, the "magical" feature of the M1 iMac is that it does have a little box hanging off on a lead (power supply and, inexplicably, Ethernet) - hopefully the last gasp of the "thinner is better" mindset. I can understand people being less than enamoured of the design... If they'd been flying off the shelves I think we'd have seen an M2 version by now.