not a fan boy since i used linux, windows and mac for work. Too many saying m1 is superb , ryzen is good(bought one) . Ryzen powerfull but still ram is my main issue and soldered to make it portable like macbook .These rumours are just weird.
Apple has just released the first Silicon chip, the low-end M1. Apple has updated three low-end Macs by replacing the Intel processors with the low-end M1 chip. The logical next step is going through the product line and replacing some more processors with M1. The obvious candidates are the low-end 21" iMacs with dual core and quad core processor, and _maybe_ the cheapest of the 27" iMacs with quad core processor. That's what I expect, and I expect it this year or in January.
The next step, and that will take as long as it takes, is creating a mid-end processor with 8 performance cores, likely 4 power saving cores, likely 12 or 16 GPU cores, 16 or 32 GB RAM, and more ports / support for more monitors. And then two rounds of replacing all Intel processors with up to 12 cores because they are not needed anymore. That will be all the Mac minis, all MacBooks, all iMacs except high end iMac Pro's replaced.
Except for fanboys being fanboys, there is no need for any design changes.
Will buy mac mini soon and give real review instead bored video editing 8k , web browser so on.