I didn't mean the comment to come over as purely a professional point of view, more do we really need such high res cameras for general use. Do we need to then upgrade to a computer to be able to process the images not to metion how many lenses would be capable of taking advantage of it all.
Billboard posters have been made form the early d series cameras for quite some time, Ive had my images blown up to just under 3m for tourism events. I have an image from a canon G6 hanging above the counters in Batemans bay tourist office which was from a sub 2meg jpeg over 2.5m.
If I had eagles eyesight and planned printing 4-5m prints then I too might get excited.
Jon