First, I know many of you don't care about video features in DSLR. But face it, it is clearly here to stay.
Please do not forget that filming with DSLR for real started with the 5D2, and a huge portion of the success
of the 5D2 is due to it's video capabilities. For me both still and video IS important, and I use my 2 x 5D2 maybe
just as much on it's video features as on it's still capabilities.
That being said, I have already pre ordered my 1DX several places to be sure I get it soon.
Resolution and speed between D4 and 1DX is not that different that it would matter for me, and probably not AF either.
BUT, assuming the D4 and 1DX performs comparable on ISO, the D4 could be a game changer in my opinion.
It could be a game changer because Nikon now has given consumers what they have begged Canon for now for years, which is UNCOMPRESSED VIDEO! Even if the 1DX offers less compressed video, it is still not uncompressed. The D4 can with this open up new creative possibilities never seen before. Even if the actual recording has to be done through an external device, the option is there, and those devices are not that expensive.
I really really hope this is something Canon is able to implement in the 1DX before releasing without major hardware modifications!
Otherwise I am tempted more than ever to switch to Nikon, sad to say, but if youre living out of photo/video, you have to have the equipment that gives you the edge on the competition.
Also the 1DX lacks the proper audio monitoring capabilites as the D4 has for movie shooters.
Now I know that Canon has officially announced the Canon Cinema DSLR 4K, which is exciting wrt resolution. But nothing mentioned yet on uncompressed/RAW video out on this camera. And even if it does get uncompressed video, it will cost me a lot to have to buy both.
Just my thoughts, we are all different, with different needs and preferences. For me it's more important to be able to do creative things to an affordable cost, or as low as possible, than to stick to a brand just for the cause of it.
Though, as many others in here, I am also a little suspicious about D4's native ISO up to "only" 12800, and then expandable up to 204.800. Especially with larger pixels than 1DX, even if just slightly.
Either there is a huge gap in what Canons and Nikons perception of what acceptable native ISO is,
or there really is a huge differnce between the D4 and the 1DX, time will tell.
So now we need to be able to compare RAW's from D4 and 1DX, and I think Canon now will be forced to release high ISO RAW files before the D4 hit the streets.