I'm currently planning to buy the D800 and, after viewing the increasing number of samples available, I have been very impressed with image quality after initial concerns about high ISO performance. Once images are down-sized I'm happy noise performance is on a par with the D700 but with superior image detail.
By contrast, there are still very few samples of true low light video from the D800 at different ISOs. The D800's video quality in decent light has already been demonstrated to be impressive. Inevitably we know the D800's performance in low light video will lag behind both the D4 and the Canon 5DMark3 but I'm keen to see just how much of a difference there is. Besides weddings and portrait photography, I intend to use the D800 for theatre and gig photography and video in reasonably low light. Some will say I might be better off with the 5DMark3 but I've really fallen for the fantastic resolution and also the amazingly useful crop modes of the D800 and I really want to switch to Nikon. (The D4 is not an option for me price-wise or size-wise)
Re low light D800 video samples - The official "Joyride" promo video has only some fleeting really dark scenes which show some noise. The first proper D800 low light "night scene" video comparison with the 5DMark3 has been posted on Gizmodo(...)
For some reason all the D800 footage has a red glow with no true blacks compared with the 5DMark3 footage (Wondering if incorrect white balance or other settings is to blame for this as not noticed this in other video samples?) Surprisingly to me chroma noise is clearly evident from 800ISO upwards in this D800 footage. I was hoping for decent noise performance in true low light conditions at least up to 3200ISO.
Does anyone have any more true low light D800 video footage as this is one of my main D800 concerns right now and video samples are still few and far between?