... it's quite reasonable to want to know what the trade-off is in terms of (a) image quality on the monitor at 100%, and ( image quality on equal size prints.
Ray,
in reverse order,
I completely agree that image quality at 100% on-screen is important, but only in the sense of displaying images so that they occupy 100% of the screen, even after moderate cropping.
On the other hand, I cannot for the life of me understand why I should care how my images look when enlarged to the rather low resolution of about 100PPI [4p/mm], giving a total image size of about 18"x24" [45x50cm], cropped to less than a third of the total image area, and then viewed from a distance of about 15" [40cm]. That is where "one camera pixel per screen pixel" viewing takes us with a 5MP sensor.
Is that even vaguely similar to the way we would want to view our photos or display them to others, unless we are in the business of intelligence gathering, or have totally lost perspective of the artisitic objectives of our photography?
a) I would suggest that those print comparisons be restricted to equal
and relevant print sizes. For most of us choosing an always available "mini-camera", adjunct to a DSLR or "big-lens digicam", the relevant sizes would not exceed standard inkjet formats; A4 for you, 8.5"x11" for me.
So only when I see evidence of significant deficiency in print image quality at up to such a size would I hold it against a particular mini-camera.