Was the 36MP sensor a Sony Trojan Horse?

Canadianguy wrote:

Interesting to note that Sony has not release any camera bodies using the 36MP sensor.

From the complaints on this board – you would think that the PDAF system from Nikon cannot keep up a 36 MP sensor...

Did Nikon make a mistake in putting the 36MP in a semi-pro body and pricing it at $3K when it could have reserved it for a higher end body (D4x???) that could have a higher end AF system to cope with the increased resolution?