I think things are trending in the direction you want. The D800 was an important step in that direction because it has a "50% better" sensor than the $8K D3x - if you define better as total pixel resolution, which was the selling point of that hideously expensive Pro body.
Now you have an FX body in a D7000 feature set. That is a second major step in the right direction.
As I understand things, the issue is chip yield. The higher the yield the lower the cost of the sensor. Having 2.3x as many sensor wells per chip seriously reduces the yield and that is a mathematical inevitability. And I think obviously there has been a major advance in yield or the D800 and D600 would not have the relatively low prices they each have in their class. Relative to what preceded them, of course.
Purely speculating, I think we are not that far off from seeing an approximately $1500 FX body, and that was the initial rumored price point of the D600. Perhaps it will take another significant leap in yield? If so, each successively lower priced and higher volume FX body should fund the continuing development of the chip side.
Just my own thoughts on the matter... I'm more optimistic than you are