I think Thom Hogan's point for some time now (i.e. prior to D800 announcement) is capture optimum pixels, for maximum flexibility in post and as a hedge for the future when their use may be even more important. This model/veil photo happens to be the first high res one I looked at on the Nikon site and I was immediately taken with the amount of detail there (and yes I could see the peach fuzz!). There is a second photo of a black model in this series and the amount of detail there is also stunning!
I do somewhat routinely use a Capture NX2 Selection Control Point, Noise Reduction, and selective exclusion of eyes and lips already even at 12mp so yes this camera will require that also. Likewise I have always heard the more pixels the better when doing more intensive edits in post. I like the idea of using Gaussian Blur (rather than NR), I'll have to give that a try.
Good luck with your D800 I think it will be an amazing camera!