>I also shoot video with a separate HD camcorder I purchased in >2011. >.... > I am 65 and I expect the next camera will be with me to >chronicle (in photo and video) the grandchildren and life’s >other great vistas for the next 10 years and hopefully beyond.
Just a caution, I am of the opinion that the D800 is a last-resort capture-the-family-events video camera. I would recommend that you keep the current video camera you have, and upgrade it as you need.
There is no doubt that the D800 takes exceptional video, but it requires stabilization, the sound quality sucks, and making the audio track right takes a lot of money, effort, and probably a second person.
Seriously, id you plan on setting up a video shoot, you get external microphones (otherwise you hear the lenses focusing), etc. then use the D800. If you just want to grab videos of the kids as they ski, cycle, run around, etc. then use your existing camera.
The D800 will get you the movies you may want, but the effort required is substantial.
Been there, done that, and now use my daughter's Panasonic FZ-200 for video when I want it.