I was a B&W shooter who chose Tri-X over Plus-X. I did do some very high detail B&W using transparency materials, but that was just to add some interest to a portfolio, not a photographic life style. I still like the look of B&W but B&W post processing of color originals is sufficient for getting me to that look. I have a X100 that allows in-camera B&W - I haven't used it ... well, I have and it doesn't provide me with anything I need over the color originals.
I would imagine that the right camera might support people with the intent of producing fine detail B&W fine art prints. My guess is that the number of people with that interest wouldn't provide much sales volume. Give that, I wouldn't want to "weaken" the Nikon offerings that would support what I want to do by diverting R&D to this camera - especially if it means not getting a dedicated pro-FX 20mm f/2.8 AFS lens to anchor the newer prime lineup.
Roger It's still, ISO, aperture and shutter-speed, right?