Ranked in these QuestionsQuestion Ranking
Pro Great autofocus
It's fast and decisive both in good light and in low light. It accurately recognizes faces and focuses on the nearest eye.
Pro Flat color profile for video
A flat color profile captures footage in low contrast and higher dynamic range allowing for easier color grading in post-production.
Con The value proposition
Nikon is a horrible value proposition.
At this writing, the Nikon D810 sells for $2796 (body only) at B&H. Meanwhile, B&H also sells the Pentax K-1 (body only) for $1896. That's $900 less. Truthfully, 99% of DSLR purchasers are not capable of maxing out the capabilities of either of these magnificent cameras. So, if you are part of that 1%, go ahead and get the Nikon. Everyone else should be getting the Pentax (and an FA 31, which you can now afford because you didn't get the Nikon).
Con Settings banks don't save all settings
Certain settings including AF and Advance modes can't be saved to settings banks and thus can't be recalled.
Con Lacks peaking for video
Focus peaking is not present in D810.