Interesting. So something like the Canon G11, but w/o the mirrors?
But with interchangeable lenses and over twice the sensor area, but about half the sensor area of Micro Four Thirds. By the way, the lens selection in those Nikon patents is heavily skewed towards long telephoto zooms, suggesting that "compact super-zoom upgraders" are a significant target market: that fits with the choice of a format smaller than 4/3" or DX.
As to cross-system lens compatibility, I am mostly skeptical:
- Nikon F mount lenses could surely be used with adaptors, but probably with inferior AF performance due to not being well adapted to the needs of CD AF (same reasons as the sluggish AF performance of most 4/3 SLR lenses on m4/3 bodies.)
- Adaptors for m4/3 lenses are unlikely: Nikon would not have access to the protocols for electronic body-lens communication, and m4/3 lens-body communication is all electronic.
- Adaptors in the other direction are even less unlikely if the format is indeed "one inch": same reasons as above, and also the smaller image circle would cause vignetting with at least some lenses and choices of focal length.
The bottom line for me is that these new mirror-less CD AF digital camera systems will overwhelmingly be used with lenses designed for them -- legacy lens nostalgia notwithstanding. Forums give a very biased view of the market, skewed towards experienced photographers with large lens investments and far-greater-than-average willingness to do without automation of focus, aperture stop-down, sensor cropping and so on, for the sake of using those old lenses.