Bob, I'm not going to have one of those shiny new Nikon-toys in my sweaty little mitts for a very long time, so I'm only speculating and extrapolating from the many tests (of older bodies) so far:
-------Disclaimer: all the following is my personal opinion------
Yes, noise and sensitivity of sensors of a given format are plateau-ing more or less. So perhaps with a 20% increase of pixels (from 8 to 10 MP or 10 to 12 MP) the manufacturers may manage to keep the s/n-level at the same level, but that will be hard to tell unless you shoot test-graphs where you can nail any increase in noise-reduction and smearing.
Sadly I believe that the DSLR-manufacturers will go the same route as everybody with the P&S, just to stay in the Megapixel race.
So we will ultimately only see an increase in resolution under optimal lighting conditions with reduced effective resolution under low-light.
But - why not? If the laws of physics limits the amount of s/n-ratio you can get out of each and every photon, so be it
Consequently you should spare enough change to get a 20MP FF-body and live happily ever after
Thomas (beware: Nikon-fanboy and moderator!) My Lens Reviews
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