You didn't frame your post which spoke of a Photoshop file having a size limitation which would pose a problem in processing D800 images as a question, but as a statement of fact. In fact, as I stated there is a limit, but it is so much larger than the file sizes of the D800 images as to be completely inconsequential. The same is true of the triviality of file size reduction.
Clearly I am interested in looking at the merits of the new camera, but with accurate factual details offered.
Yes I am in a quandary about which camera to purchase. I ordered them once ordering opened so as to not be very far down on the shipping list, knowing I had time to cancel one or the other before shipping occurred. I ordered neither on rumor or speculation as you infer, but ordered both after Nikon released their announcements of the cameras. One of my D700 cameras is about at the end of its useful life and needs replacement before it fails during a shoot.
I am in a quandary, not because I am questioning the merits or value of the two cameras, but because their specifications are so good, and because most of the specifications important to me are very close to each other, with a few of the others far apart. I am in a quandary not because these aren't excellent cameras, not because I anticipate problems using them, not because processing their images will be at all difficult, but because they also have specs in some places which are significantly apart, and I'm having trouble balancing the choices.
Your inferences and insinuations are far off target.