Of course the limiting performance item is the v700. When print size matters, I presume it is a great image, and perhaps you would be willing to invest in a well done drum scan for ultimate quality.
You forget the all important aspect of movements. A D800 of any flavor can't do full movements. Of course you could buy a PC (tilt/shift) lens but that alone will cost as much as a 4x5 *system*.
As others have said, this is an apples to oranges comparison. I own both a complete 4x5 system (Chamonix 045N2, 65, ,90, 135, and 300mm lenses) and a D800 with 17-35 zoom, 50 and 85mm primes, 90mm macro, and 80-200 zoom.
Oh, and a v750 for home scans.
I use every bit of both kits, for different purposes. I can't chase around moving targets with the Chamonix, and I like my landscapes and night photography better in 4x5 film.
Pixel count? Who cares? Color depth and quality? I'd have to hand it to 4x5. Pick the film that captures the color you seek (Portra and Ektar are both great films for their respective purposes, and scan very well).
Bottom line - your choice depends on what you intend to do, not on some pixel peeper's notion of "better".
But, frankly, if you are asking this question in this way, don't bother with 4x5 unless you really want to control every possible aspect of image capture, which includes a much, much longer list than what you posted.