The thing is that from PS compact to u4/3, the difference in perceived IQ is clearly visible. From u4/3 to APSC, the difference is still visible but less than PS to u4/3. From APSC 24Mp to FF 24Mp at low ISO, the difference nearly not visible and there is one stop advantage at higher ISO. But from the D800E to a A7RII, we are talking about a practical difference of less than 10%, the difference is more in our mind that on the picture itself. So, of course, when a new camera is release, there a lot more hype than the actual improvement, it's the WOW effect that is gone after 6 months. I think unless there is a revolutionary innovation on digital sensor that render images like film, even new full frame cameras are going to be harder and harder to sell: today you can already buy very good full frame cameras second hand for less than $1000. I noticed that within a time frame of 2 to 3 years, every camera maker is more or less able to align to the same technology, so the wise photographer not being in hurry can have the same techno as everyone else without spending all the money required to switch from one brand to another. As for the photographer who is not able to see the big picture, I'm sorry for him to spend this huge amount of money to switch from Pentax to Sony, Nikon or Canon for having 10% better IQ that the human eye can less and less perceive, and technology that he would have had anyway by waiting one or two years.
---------- Post added 22-08-15 at 08:27 ----------
Originally posted by shaolen a 42 mp pentax FF would cannibalize the 645Z
Cannibalizationcan be good, especially if it leads to 10 x times more revenue and similar gross margin.