Originally Posted by jawanda

One of the awesome things about the D800 is that, at 36MP(!?!), you can use your DX lenses in cropped mode and still be shooting at a respectable 15.4MP. As opposed to buying the much more expensive D4 that is coming out at only 16MP and will crop your DX lenses to like 8 MP.

For someone who has a bunch of great DX glass and doesn't want to have to replace it all at once the D800 is one hell of a good choice.