Assuming they announce two sizes, a pair of new size options, 14" and a 16", or even just a new 13" plus the standard 15", I wonder if there will be any notable performance difference?
In the Intel days, the larger MBP had faster CPU/GPU options, so often times you had to go bigger/heavier/less-portable to get the most performance (some was thermal considerations for the case / some was just product placement).
Now with ASi / M-series products, there's less variation, if any, in the implementation between two different machines. For example: the M1 MBA vs. the M1 MBP, assuming the former with the 8-core GPU option, the M1 package (as I understand it) is the same, the MBP just has active cooling/fans, so it has more thermal headroom vs. the MBA, so loses less performance over time (under load). Of course the MBP model also has other non-processor improvements (or deficits, depending on your like/dislike of the Touch Bar
)
I believe the M1 based Mini is also the same M1 specification.
But anyway, this will be super interesting. I suppose they could run the M<TBD> in the larger chassis faster (not unlike the Intel situation), or offer additional cores - I'm not sure from a fabrication standpoint if that even makes business sense.
__If__ it was the same M package, that would be interesting in that it's just a matter of the size of the machine. Heck for me, where I would rarely use the display, I'd take the smaller size (assuming I don't wind up with another Mini).