Bibhav,
6800 USD is the estimated retail price. Traditionally the 1DS series is priced around that.

Considering that the frame rate is such a huge jump over the 5fps of the previous EOS 1DS Mark III, one can really feel impressed by the technology.

This reminds me of my EOS 1V of the film days.

Considering that I had filmed gaurs jostling before dawn at 12800 ISO at f2.8 at 400mm, I am wondering how the quality will be at ISO 51200, as that is now the max standard ISO. With larger pixels, the quality should be great. Looks like we are moving towards shooting in the dark.

It would have been fantastic if Canon would have included a resonable slow motion capability ie. 60fps at 1080p. That would have really helped in capturing action sequences. That's the only thing that is hurting me. Even during the 1D Mark IV video review ( Mark IV Review: Part III – Video - Indiawilds: Land of the Tiger. Conservation, Wildlife Photography, Communities ) I had mentioned that. I guess, Canon is saving that for the pure film cameras.

Have to check how good the video codec is in actual practice. Canon says the new intraframe (ALL-i) video Codec is good with less of compression. That means the file size is higher and better. Have to see whether this codec and compression is approved by BBC and NGC. That will mean a lot for wildlife shooters. Quoting some details about the compression from Canon"
[QUOTE]
Compression
The biggest change to the movie shooting is the ability to choose from two different compression methods — IPB or ALL-I — depending on your needs. The EOS-1D X still records movies using the H.264 codec but it is the compression type within this codec that has been changed.

When shooting movies, the frames that are captured are usually split into key frames or Intra-Frames and predicted frames. These Intra-frames are used as reference frames to help with compression.

The first type of compression available is IPB. The B in IPB stands for Bi-directional compression. With IPB differential compression is carried out by predicting the content of future frames, with reference to both previously captured frames and subsequent frames. Like the IPP compression method used in previous EOS DSLRs, some data is stored in a Group Of Pictures (GOP), meaning that frame-by-frame editing will result in lower image quality. When using IPB editing video in-camera to trim clips can only be done in one-second increments.

The second method of compression is designed for users working in high-end editing systems or those looking for the very highest quality. This compression is called ALL-I. ALL-I stands for ‘Intra-coded Frame' and it differs from IPB and IPP because all frames captured are treated as Intra-frames or key frames. Although each frame is still compressed, there is no further compression as each frame is seen as an individual image.

When filming with ALL-I, file sizes will be around three times larger than with IPB, and it is easier to edit to an individual frame without degrading the image quality. Despite the extra file size, ALL-I compressed footage actually requires less computer processing power than IPB or IPP and consequently will playback more smoothly on lower specification computers. This is because there is no rendering needed to extrapolate data from the GOPs used in IPP and IPB."

[UNQUOTE]
I am surprised that this camera doesn't have a flip LCD screen. So the LCD screen at the back is fixed. The practice of a tilt LCD screen at the back was introduced first in the Canon 60D camera and has not been carried to the 1D X. So for low angle Videos, one has to depend on an external monitor.

This will be available in March 2012. For a still photographer, this is an absolutely delightful camera. Price is a tough question though if you are not making money from your camera.

For a filmmaker, this can act as a good tool as a B camera (primarily because of the lack of slow motion at 1080p). Else, this is a great tool.