Ok i agree nothing definitive that d800 is in the same league as MF. Price not the same class. In terms IQ ok MF win, but by how much? To a layman able to get 36mpx at that price where previously these resolutions belong to MF grade. You tell me, izzit this a game changer?
It's like bring the 35mm up to the big boys and the pics are not that bad either. Yah u can say its not MF grade. But at the price for that quality. If that's not value for $ dun noe what is.
If you think about it, MF will have better advantage in terms of thin DoF, favored by wedding photographer such as Jose Villa. But if you just compare shooting Portrait, Fashion or Landscape where more likely you will go for deeper DoF, D800 might get a touch on what MF is doing.