Here's a quick preview image from the 2013 tour opener for Grace Potter & the Nocturnals at the Pageant. This was shot with the Nikon D800 and Nikon 24-70mm f/2.8. Hit the jump for the exposure and an little crop, just for fun.
The exposure on this image is 1/100 second at f/2.8 and ISO 5000. I'd been shooting at a higher ISO, but when Grace Potter dropped to the stage, the frontlighting was killed and it was all backlighting and accents from the sides, so I dropped the shutter as well.
As you can see noted, I shot this gig with the Nikon D800, somewhat as a test for myself as much as anything. Is the weak 4 FPS fast enough coming from the Nikon D3's 9 FPS? The answer is “pretty much.” It's not ideal for events, but it's certainly more than workable.
But more to the point about the D800 is all those pixels. The original file's resolution is a whopping 7360 x 4912 for the Nikon D800's full 36.1 million pixels.
And here's a crop of the full vertical height of the image.
Now the interesting thing here is that the resolution on this relatively extreme crop is still 3278 x 4912—or, in other words, still a 16.1 megapixel image. Easily more resolution that the Nikon D3 or D700's 12 megapixel file.
None of this should really be surprising, but it does go to show a real world value in the absurd resolution of the Nikon D800: flexibility.