ezradja: Canon video user but use Nikon for studio work here. Nice high end camera, probably would never handle this one just like the Canon 1D series. Too expensive :)The clean video output is the greatest thing this camera has, probably, but the limitation of 30fps would turn off a lot of video-makers. You know, 24fps holy-grail. :)
Same price range, similar spec (compared to 1Dx), I would predict that the photo performance would be in similar fashion. Noise, Color, speed etc etc.In video area, 1Dx has new h264 coding method that made it easier to edit but the D4 has clean external output (that you could put external recorder such as atomos ninja or else)
citing from the preview:"D4 can shoot 1080p movies at 30, 25 or 24 frames per second and at up to 24Mbps."