Image on top: The analogue Nikon S2 rangefinder
According to our veeeeeery good sources Nikon will unveil their new mirrorless system in April! Nikon developed a very advanced (and expensive) pro system not meant for the amateur market. Nikon chose to go "pro" for two reasons:
1) They wanted to enter the market by offering the very first professional mirrorless system. Current mirrorless systems like the Sony NEX, Samsung NX and most Micro Four Thirds cameras (only exception may be the Panasonic GH2) are competing in the advanced beginner or amateur market.
2) Nikon believes an amateur mirrorless system would not have appealed current mirrorless users and only cannibalize their very good selling entry level DSRL market.
We are currently investigating the possible specs of the first camera and lenses but one of our trusted sources already told us that Nikon will use some kind of "tweaked" Sony sensor. Nikon tested two sensors, a 16 megapixel and a 24 megapixel sensor. We don't know yet if Nikon will use only one of those or both sensors!
We hope to can give you more details soon...