From the Sony 24mp sensor (approx same pixel pitch as a 36mp),
pretty sure you're wrong on this. pixel pitch is a function of area as far as i can tell, and area is achieved by multiplying the two right angle sides of a rectangle together (or some such).
FX is 2.25X larger than DX in terms of area. 1.5X is just one edge.
A D800 with a 36Mp sensor will have the same pixel pitch as a D7000.
Granted, this camera will not be for everyone, but it will definitely be for me. I only get 166ppi when printing on my new Epson 3880 at 17" X 25.5". With the D800, i can crop and still get 300ppi!
atm the best low light camera is the D3s, I agree nikon needs to bring out a killer low light camera as well, but why expect one camera to do everything. they can just bring out a low MP D(x), and it looks as though they will.
As for the people complaining about slow write speeds. we will see, but the expeed3 looks impressive. with this camera i would be happy with 5Mp in FX and 7-8 in DX mode.