C Fast memory cards in New EOS bodies ??

If there's a 5Dcinema (didn't we see that rumor recently?), that'll have CFast. Past that, I have to agree with dolina - the new 1D might, but the stills-oriented 5D won't until the 5D5 (or whatever they call it, which might be 5DX if they fold the video features back in).
 
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Top end write/read speeds of each card type.

167MB/s = CF UDMA 7 cards
312MB/s = SDXC UHS-II cards
600MB/s = CFast 2.0 cards

As of today no Canon dedicated still camera uses SDXC UHS-II or CFast cards. Buying the SDXC UHS-II card will not improve the write/read speed of any Canon EOS camera nor will any CFast card physically fit into any Canon dedicated still camera.

Replacements for the 7D Mark II, 5D Mark III, 5DS, 5DS R, 1D C and 1D X may use SDXC UHS-II & CFast cards.

Timeline for these replacements can be as short as 6 months to 5 years from today.

By 2020 I expect 512GB CF and SDXC cards to sell for less than $100 (adjusted for inflation). SanDisk 512GB Extreme Pro UHS-I SDXC U3 Memory Card (Class 10) sells for $499.95 and Lexar 512GB CompactFlash Memory Card Professional 800x UDMA 7 for $749.95 on BHPhoto.

The only Canon cameras to use CFast cards are the C300 Mark II and XC10 announced earlier in 2015.
 
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