I'm desperately waiting for the next gen 16" to come out, but fear it won't be until next Spring.
I'm surprised Apple did not upgrade to Comet Lake-H with the 5600M+HBM2 option because that should have required a new motherboard so they could have moved to Comet Lake at the same time (since that also would have required a new motherboard).
This makes me think Apple might be planning to move the 16" to Apple Silicon along with the rumored 14.1" model and that could not happen until late this year at the earliest because they require macOS 11 (Big Sur). If Apple is also waiting for MiniLED displays for both models, that too would push back EIS.
i think they do mini led first but arm at the same time probably unlikely. Still the question is does the 14" get it first or do we get the iMac remodel.
I believe the ~24" Apple Silicon iMac is ready, it just needs to wait until macOS 11 is ready later this year. I am inclined to believe it will ship first because I have not seen any rumors about it going to MiniLED (that appears to be an iMac Pro refresh-only option per Kuo) and the MiniLED Mac portables that were originally rumored for Late 2020 now seem to be hedging into early 2021.