It seems Leica has indeed delivered the product it should have delivered with the M8.
the one issue it now has it that here are clear full frame competitors to go head to head with, at similar, or much lower prices. Direct comparisons are now a lot easier to make, if still clouded by Red Dot Fever on occasions.
I suspect the following simple truths will come to bear:
No AA filter will mean good sharp images at base ISO.
No AA filter will also mean Moire issues on occasions (test it in sunshine in an urban setting, ideally with people in suits etc, at optimal aperture) Landscape workers should have little to worry about, but by no means is this an issue confined to textiles.
Poor high ISO performance, which does matter as working in low light with faster films, was one of Leica's strengths. All the competitors have good fast lenses too, but if they can do 800 or 1600+ ISO cleanly, and the M9 can't, then the Leica will not be the first choice in challenging light conditions - which will be a turn around from how it used to be.