I think you're living in a fantasy land if you think there will be a 1DX replacement anytime in the next three years, if ever. I'm on record that it's the last top end, professional, conventional DSLR Canon will ever produce. To the extent it is upgraded, that will happen through code -- firmware.
The 1DX is so advanced at this point there is little they could realistically improve upon. What can they possibly offer that will induce high-end stills shooters to dump their $7K camera for a new $9K camera? Combine that with quickly changing technologies, and the industry is simply going in another direction altogether. Five years from now the 1DX will still be the top still camera with video capability.
The future will be video cameras with stills capability. A whole different world is emerging.
Well they could start by giving it the MP of one of the cameras it is supposed to have replaced, or even, as has always been the case previously, give it a slight bump, 26mp sounds sweet to me. Then:-
- Improve DR
- Improve low iso performance
- Add ever more to high iso performance, some will never have enough
- Use dual pixel technology
- Build in WiFi, who doesnt use it now in a pro environment?
- Build in GPS, it is a $2 chip not a $400 addon
- Build in RT Speedlite transmitter, it won't happen but boy it would be nice to shoot with a "clean" camera every now and again
- The transmisive focus screen could give a lot more info
- Make it lighter
To name just my most important top few.
You can go on record all you like, play King Kanute, the next 1D is comming and it is due to announce this year, the market that buys these cameras in bulk needs to buy new cameras, it is just a product cycle, they will be using them at the Olympics and World Cup, just like they always do. We will start to see blurred pictures of mystery bodies, I'd be taking pictures of the remote controlled cameras at the major venues to see what is comming later this year or at the latest early next year.