Seems everyone should know what it will or will not do before one could say what they would pay for it.
Given that Canon is, ahem, not rushing to get the 1Dx onto the market I'd be astonished if it was anything less than a winner in most respects. I say most, because nothing is perfect. We have had a good practical heads up on some of the 1Dx qualities and specs with the 5D3. With the usual 1-Series ergonomics, build quality and that feeling of being carved out of a solid lump of Unobtanium, if I were a betting man I'd be backing it into first place.