https://wccftech.com/2021-imac-first-arm-based-machine-arriving-q1/

Apple’s redesigned iMac was supposed to be previewed at the 2020 WWDC keynote, but plans were scrapped at the 11th hour. Fortunately, the company did announce the transition to its own custom ARM-based chips, with each Mac product expected to feature this silicon in the near future. Unfortunately, if you were looking to see the first iMac get treated to a custom chip in 2020, one individual claims that you’ll be fresh out of luck this year.

One Twitter user called Kindred believes that the redesigned 2021 iMac that will also feature Apple’s custom silicon will arrive during Q1 next year, though he mentions that he’s ‘75% sure’ about this claims. Regardless, if someone is more than 50 percent confident about some product release, then we might as well talk about it here, but we’d still advise you to treat this information with a pinch of salt for now.