>Therefore, there is no need to have a serious amateur camera like >D400 or D500 shooting 16MP when the rumored D800 can also do it in >DX mode.
I wouldn't say that. You're ignoring the size/weight, and the price factor - a 16MP DX "D400" could easily be 30% cheaper than a 36MP "D800".
I do not disagree with you. That is why I said the "D400 or D500." There could be a D400, but I seriously doubt a D500 and beyond (I could be wrong, of course.)
The sensor is probably the most expensive component of a camera. After Sony and Nikon recover the R&D costs of the new 36MP, I have no doubt that in two years, it will come down drastically in price. Furthermore, I cannot see going beyond 36MP. The future sensors might be more sensitive with higher ISO performance and cameras with better Xpeed processors, probably introduced with the single digits pro cameras.
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