We'll potentially get to use it in some of the Pentax 645Z discussions, since the additional pixels allow to print them smaller/denser for smaller output sizes, which also has an impact on the output size of the diffraction pattern, and thus DOF and Focus stacking requirements. For larger output sizes it just means we can print larger with the same resolution.
That's why I want to calculate with accurate dimensions, it allows more accurate planning, with fewer surprises when faced with an unknown/new shooting situation.
So I started a new thread here. I've been waiting for something like this. Thanks so much.