Yes I make the same prediction and I quite like the tier system.Can’t wait to see the M1X/M1Z coming in the macs due mid year.
My prediction is a good, better, best chips updated each year similar to the A# chips: M1, M1X for mid level, M1Z for Mac Pros, etc.
Here are my guesses.
Good (M1): Current models up to 16GB RAM and 2TB storage:
Macbook Air
Mac Mini (2x USB-c)
Macbook Pro 13 (2x USB-c)
Better (M1X) Up to 64GB RAM and 8TB Storage
Macbook Pro 13 (4x USB-c)
Mac Mini (4x USB-c)
Macbook Pro 16
iMac 24 inch and possibly 30-32 inch
Best (M1Z) Up to 128GB RAM or maybe 256GB RAM and 32TB Storage??? Who knows
iMac (Pro) 30-32 inch
Mac Pro
Possibly a really high end MacBook Pro 16??? Maybe not