I was scared this was going to become a MP flame war. And we're almost there. That's not what I intended the post for. As Derrel said, the D3x's DR was astounding. The DR of the D800 is impeccable as well. Resolution from both cameras is incredible, especially from the D800. Landscapes with the 46MP, if Canon comes out with some good WAs, could be something great. But, either way, the D4's high-MP successor will rival it and will produce incredible images akin to the D3x over the D3200.
As for the 7DII, the MP were the least of the worries here. Higher video frame rates will CERTAINLY trickle over to Nikon. That's great for me. ISO range sounds fantastic, and at 10FPS (which I have NEVER used, and probably will never need. I don't care much about this one. But, it does mean that the write speed of the camera is great.) Pro-grade AF and weather sealing (not necessarily pro-grade). All good things. So, MPs notwithstanding, it still sounds like a great camera. Something that would go as a great backup to my D800 (Nikon's counterpart, of course).
Oh, and the specs are from Canonrumors. So, they should be taken with MANY grains of salt. NR does a much better, and more reliable job than CR.
Mark