IBIS is probably an order of magnitude harder to implement in a DSLR than in Mirrorless, because of the way that they meter, focus, and expose. I wonder how far down the line this feature will go ? - I'm thinking not far given the D6 will cost the same as a reasonably priced car !
I think in general (and especially at the Pro levels), DSLR'S will live on until all Mirrorless banding /star-eating, and EVF resolution /speed /lag /blackout issues are resolved. The OVF seems to have a lot of life left in it yet - you would have to think that a hybrid overlay showing live blinkies /zebras is the next trick in the book for the mid-life upgrade say ~3 years down the track. The development pace of DSLR's may slow, and I expect mid range models to become parts bin specials. I think low end DSLR's will disappear purely on a Bill of Materials cost saving basis by transitioning to Mirrorless.
That's not to say this delays Mirrorless - rather they coexist - 1 declining in the rate of R&D, the other one progressively ramping up. I think we will see APS-C Mirrorless Z's soon, and then the ~60MP Z8 next year sometime. I think the Pro Mirrorless doesn't land until 2021 ......
I really hope the D500 gets a generational update based on the D6 - at least improved metering, focus, and processing hardware and software, and maybe another genuine 2fps up to 12 with AF/AE/Tracking, and keeping the 200 full RAW buffer. IBIS may be a bridge too far at the APS-C price point for now. Smooth uncropped video capabilities at 4K30p oversampled at least seems to be a must in this market, the higher frame rates can be cropped to offer differentiation from the D6.
Paired with a PF 600mm f5.6 surely it would have to put plenty of bums on seats. Importantly as I've mentioned more than once - I think releasing this D500S or D560 or whatever, would buy valuable time for Nikon to develop Pro level Mirrorless AF systems. I agree with previous comments - those need to be right and competitive with what is likely to be a pretty impressive Sony a9 II market leader, straight out of the blocks.
Chosun :gh: