The fifth beta version of macOS 11.3 supposedly contains hints about the direction of the iMac, Apple's all-in-one desktop computer series. So far, references to two new iMacs have been found, both presumably running Apple Silicon ARM SoCs. Other exciting upgrades are due this year too, including a redesign for the series.
https://www.notebookcheck.net/Two-new-Apple-iMacs-have-been-spotted-in-macOS-11-3.529179.0.html