People still think that the new rumored EOS R can compete or make the 1dxIII lose sales. I disagree. Don´t forget that the 1dx is a segmented camera for some photographers, specially sports photographers or photojournalists. The news agencies and serious sports photographers will buy the 1dxIII with no second thoughts. They need the speed, and not only the frames speed. They need speed of communication. The video specs on the 1dx mkIII are a plus to the camera. They put it to make the best camera possible and to attract some videographers that like/need robust bodies with the best of the bests weather sealing. Most of this clients will never considerate a mirrorless camera like these ones that are coming. Are you thinking that a sports photographer will buy this new camera? No way! Also, I don´t think this new mirrorless to have the same AF sistem of the 1dxIII making this feature an exclusive of the 1D series. It can have great AF but not the same! Canon did the same with the 7D mkII.
The new camera (let´s call EOS Rs) can really make a difference in creative videographers that like/want smaller bodies and dont care so much having the best weather sealing. They can also make some wildlife photographers not to buy the 1dxIII and buy instead this one. But they are a small fragment of the 1dxIII buyers. This camera is more aimed to landscape, studio, weddings, and wildlife if you can live with smaller fps.
If this camera has some serious video specs like 1dxIII and serious still features it can make some people to choose this one.
Sooo, regarding to the camera....this looks promising! I can live quite well with a cropped 4k@120fps! 8k timelapse would be fantastic. And having 4k 10bit 4:2:2 would be quite perfect! To be honest less than this would make a lot of people (from video side) to lose interest in the camera...Hope Canon maintain the 1dxIII codec and give in this one the HEVC H265 (Woudn´t make any sense if not!)
From stills perspective, i expect a less capable AF camera comparing to 1dxIII but still with same great AF! Expect between 7 and 12 FPS and I expect also CFexpress. It just wouldn´t make any sense not to equip the camera with CFexpress after they public say that this sistem is the future!
Hope camera will have also HEIF! I would love also to see in the camera a back button focus like the 1dxIII it seems very promising feature!
In general, if the camera is something around this, Canon will have my money. Ohhh....I expect also some improvement in the EVF, that would be good.
Ohh boy....2020 is going to be painfull to my pockets!