MF market is not that big as of DSLRs, changing the system from one brand to another is always expensive. So if new MF camera are released in future around 8-10K range, and glass extra. yeah pentax came with 645D, i don't think canon will soon be planning to design new MF Camera, but sony is likely to do first .
Really? Is this the new math? Have the basic principles of geometry changed when I wasn't looking?
The largest square that can be inscribed inside the image circle of an EF lens (43.2mm diameter) is a 30.6mm square, not 36mm. So, if you then pull a 3:2 rectangle out of a 30.6mm square sensor (30.6 x 20.4 mm), you get a resulting image that only slightly larger than APS-H.
Alternatively, they could put in a 36mm square sensor and you'd just waste most of the corners...so, would you pay $12K for a camera with the build quality of a 5DII (cost increase based on the number of 36mm square sensors that could be pulled from a silicon wafer, compared to FF sensors)?
It's not like you invented it or something . Panasonic did it in their LX P&S for years. I don't think they would make a larger much more expensive sensor and waste those precious 3.3%.
As a sensor gets larger, the cost increase is not linear. Right now, a FF sensor is very expensive to make, a 36 X 36 might cost 10 - 20X the price. The number of pixels on it are not the factor, its the area.
Then, the lenses will start at $3500 and go up, - way up.
Heres a somple 35-90mm f/4.5-5.6 MF zoom, imagine the price of a f/2.8.