In regard to discussion about the new iMac design and how it might influence the new MacBook Pros - I don't think it will. I'm expecting Apple to take an entirely different approach to the Pro models. I also think the 27" iMac will be replaced by a new iMac Pro that has a different design from the newly introduced 24" iMac. Whether they call it iMac Pro is of course up for debate but I think that would be the smart move to differenciate it from the low end one.
And as for ports, the 24" iMac is low-end and they didn't keep old ports because the M1 is limited when it comes to I/O - I fully expect the reports about returning SD-Card and MagSafe to be true - more skeptical about HDMI and possibly USB-A but who knows. Apple is finally reconciling their Pro machines in all areas - this began with the new Mac Pro a few years ago, the 2019 16-inch MacBook Pro, and culminates with these new MacBook Pros with Apple Silicon.