Originally posted by monochrome
645Z has a hinged LCD. I
believe the 645Z has a dual processor and a dual bus. 645Z has the K-3 AF points.

Mechanical things are easy. Software is very hard, a multi year process of development. Any real advance in camera technology comes from some chip somewhere. The hardware stuff is nice if well done, but is essentially a manufacturing technology issue. Any of the desired advancements are about software; better video, even mirrorless with fast accurate focus, evf's etc. This is a computer industry now. Full frame is simply a bigger sensor with more data to shuffle around.
That is my point. Is the full frame a move to a more advanced software platform that will disseminate through their product line, or is it an extension of the existing software stack applied to the specifics of a full frame DSLR? If I were Ricoh, I would bring out the fancy and complex stuff in a high end offering and disseminate it downwards. At one point they have to stop having a cheaper and less endowed body have better processing or focus than their top of the line flagship offering.
I don't think that they will sell millions of FF dslr's, in fact the delay in offering one is about them not seeing a profitable path in producing one. They need to be in that space, so their question is how can they make one and have it contribute indirectly to the enterprise? Two ways; one is to have it as a platform for ideas and technologies that will disseminate through their other products, using the existing lens list with a few additions that will be popular and useful for the aps-c bodies. Over time they may find a slightly less endowed FF may be their top seller and generator of income, but the price point needs to drop.
That is why I don't see a mirrorless FF. They would need a whole package of lenses for a new mount. I suspect a very nice 810ish body, a bit cheaper, and showing off all the goodies that will come in the next aps-c offering. Or a 610ish body, essentially a K-3 with a larger sensor. I have no idea which, but what they do will be indicative.
---------- Post added 11-19-14 at 08:07 AM ----------
How long has it been since the beginning of development for the K-3? I would think somewhere before the time of the K5II release. That bought them some time to get it done. The K-3 was released last year around this time, and they probably had already a start on the next iteration at that time. So maybe they have something new that is ready to go.