Agreed. I wasn't really arguing, merely pointing out that with a 36 MP sensor and a good lens, the old 1/focal length guide isn't very useful any more. You need to be careful at virtually any shutter speed. The two examples above are really tiny pieces of the full frame, and with a 12 MP D700 I'm not sure they would have been distinguishable to any practical degree.
So the D800 is already very much a tripod/live view/mirror up/cable release piece of equipment, at least if you want to make full use of all the pixels. The D(X)-series, on the other hand, is targeted mainly at photojournalists. Built to survive an earthquake and extremely fast - those are the top priorities for a journalist. And that's also why the price tag is three times higher.
The point I'm trying to make is that a 50 MP sensor is of limited usefulness in the target market. Those who really need high resolution will probably be better served with a D800, they don't need high speed or military-grade build. I know I don't.