Source: http://www.engadget.com/2013/01/07/nikon-unveils-j3-and-s1-with-73-point-af-and-15fps-stills/
Nikon clearly wants to make amends for its unspectacular J2 launch late last summer: it's launching not one but two 1 series models that provide a stronger incentive to go Nikon among lower-end mirrorless cameras. The 14.2-megapixel J3 and 10.1-megapixel S1 mostly receive hand-me-down features from the semi-pro V2, although that's not necessarily a bad thing. The leftovers give them uncommonly accurate 73-point autofocusing and an upgraded Expeed 3A processor that can handle 15FPS burst photography with continuous focus -- three times the frame rate of the J2 in the same conditions. Apart from their resolution, the main separators between the J3 and S1 are the J3's inclusion of a simple panorama mode and a slightly wider ISO range for the S1, which starts at ISO 100 versus the J3's 160.
Both new bodies ship in February, when the S1 will lower the 1 system's entry price to $500 with an 11-27.5mm lens, and the J3 will have a suitably in-between price of $600 with 10-30mm optics. The shooters will soon be joined by new lenses and accessories, as well. A 6.7-13mm (18-35mm equivalent), f/3.5-5.6 wide-angle lens and a 10-100mm (27-270mm equivalent) f/4-5.6 telephoto zoom don't have definitive release dates, but should respectively cost $500 and $550. Scuba divers who want a J3 or S1 for their excursions will also get a WP-N2 underwater case in February, albeit at a $750 price that's more expensive than the cameras themselves.
Source: Nikon