...so to speak.
Having decided, almost a year ago, that I wanted a Nikon DX body to augment my D800 and D800E and give me, as it were, the full kit (as far as bodies are concerned) I put off purchasing until the much-predicted D400 arrived.
Eventually, I gave up waiting and opted for a D7100 instead.
Having used it a for a bit, I have to say that I suspect we will never see a D400. There really would be no point. OK, the D7100 has lots of features that I will probably never use but then, with my FX cameras there are also features - such as movie mode and live view - that I don't use. That's not a problem. What is important is that, in terms of features that do matter to me - such as image quality, AF performance, etc - it is so far ahead of my previous DX model (a D300).
Other bonuses are the fact that it has a magnesium alloy body (rather than polycarbonate) and that it has the same dust- and water- proofing as the D800.
I have to add the caveat that I have used it, so far, almost exclusively with the Nikkor 70-200mm f/2.8 VRII lens but, within that limitation, I can't see that it was worth waiting any longer for a D400. I am surprised, but pleased.