Yes, I always believed Apple programmers were aware of all the potential problems.

There are also much older implementations: Postscript has "only" 595 x 842 "logical" pixels for a whole A4 page but it's just a first step in working with any resolution of the printer.

And NeXT started with http://en.wikipedia.org/wiki/Display_PostScript and Apple has http://en.wikipedia.org/wiki/Quartz_2D

To competently argue the topic it's good to understand more than "this number is different than that number."