Information source from an unpublished article of the French printed magazine Response Photos.
Via DCView (in Traditional Chinese, Google English Translation Here)
Here are what's special:-
1. New unique type 6-colour filter per pixel APS-C sized sensor in 16MP, pixels are not in Bayer arrangement, no Anti-aliasing filter is required;
2. Separate AF sensor and detection (not sensor image contrast detection type, I think);
3. Optical viewfinder's Angle-of-View automatically couples with the lens mount for its focal;
4. Optical viewfinder now has electronic display information overlaid, i.e., the best of both world.
Last Story:-
Fuji X-Pro 1 Family Official Product Pictures First Leaked