“As lenses get sharper, we have the opportunity to make more realistic images. However, the things that impair resolution — diffraction, depth of field, focus curvature, and the like — become more important. So managing the sharpness of the detail that the sensor can resolve properly (information below the Nyquist frequency) becomes more important.”
I like Jim Kasson, but I think he has completely missed the sense of reality in this case…