The new computer is "by far the most powerful and capable iMac ever", Apple claimed, pointing to a range of spec updates.
But perhaps the most surprising is the addition of a new 1080p HD camera. The webcams in Apple's computers have received sustained criticism in recent times, particularly as video calls in lockdown have revealed the low quality of the cameras found in even its more expensive Macs.
In addition to the new camera, Apple has added new and better Intel processors, doubled the memory capacity, new graphics processors and better mics and speakers.
Notably, the computer still uses Intels chips rather than its own. Apple has promised that its computers will move over to its own chips, with computers using that architecture available by the end of the year, but also said when it announced that change that it would release new Intel computers as well.
It also brings a new nano-textured glass option for the display. A version of that technology is already found in Apple's Pro Display XDR, and allows the screen to avoid reflection and glare for a better view.