My understanding of microlenses over the CCD chip is that they are a mixed bag. While suppressing noise in the shadows, they cause problems for
wide-angle lenses especially if they are shifted off-axis. Could this be why the Hasselblad 28mm lens is less highly regarded than the Mamiya/Phase One?
Awhile ago on this site, Dalsa announced a new 48 megapixel chip that has microlenses, but ones help out with the noise, but don't cause the problems
with W/A that the others do.
Who would use this chip? Phase One already has two 40 mp Dalsa backs without microlenses, Pentax and Leaf are married to Kodak which use their version of
them.
Dalsa is very proud of this chip and features it, prominently on their site. Maybe Mamiya would bring out their own back with it.