The perfect camera hasn't yet arrived - for me it would be a small, full frame digital camera with between 16 and 24 megapixels. The D7000 comes close, but the lack of wide angle primes is frustrating. How about a 20mm AF-S G f/2.8 that would be the equivalent of 35mm on a DX body? Will it ever come!?
Street photography is my favourite type of shooting, and I'm doubting the D800 will be good for that: it's big, and with it's huge pixel count, it will be very demanding of technique, and probably not good for quick street captures - we'll have to wait for the reviews.
So, in the meantime, I'll use a D7000+35mm f/1.8 and a FujiFilm X100 (35mm equivalent) for street shooting.