The resolution of D800 is similar to that of 4x5" film. For landscape photography I think that with that amount of resolution you really need tilt/swing to be able to optimize your depth of field. High resolution opens up for a whole different shooting style.
I don't see a move towards traditional view camera techniques though, and there are not too many tilt/shift lenses to choose from either. Shooting ultra-wides with distorted perspectives and not care seems to be the modern style of landscape photography :-)
Just out of interest, where did you get the data that the resolution of the D800 is similar to 4x5 film?
I definitely wish there were more ultra-wide tilt-shift options, though. 24mm, with 12mm of shift, is great for stitching, but, when you want everything in a single frame, I'd prefer a 12-14mm tilt-shift lens - a bit of forward tilt to align the plane of focus closer to the ground plane, and a bit of upward shift to keep trees vertical. Zeiss or Leica, where are you?!