According to latest rumors, Nikon is rumored to announce a high-end compact camera with 16MP DX sensor, fixed 28mm f/2.8 lens, Expeed 2 processor, the camera is rumored to be announced this week, Nikon may also introduce DX format Mirrorless camera in 2013 (see Nikon Patent 18-55mm Lens for APS-C Mirrorless camera), No update available about Nikon D7000 successor.
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If only Nikon had as good design (and image quality) as the Sigma DP2 Merrill you used for the mock-up.
Nikon coolpix A is now announced take a look – http://thenewcamera.com/tag/nikon-a/