That is what was one of the things going through my head when I wrote the previous post. Basically, AF needs to get faster, sensor temperature needs to be controlled when on for extended periods, batteries may need work, etc... However, that technology is being incrementally improved with every DSLR release. Eventually, they will have the technology proven out with various DSLR (or at least proof of concept) that Canon's management will have the confidence to push full ahead without fear they will be taking a step back in capability (like Sony's lack of battery life as one example).
Since the 1DX II announcement, I have been curious how well the Live View focusing was going to work on the 1DX II. Getting that focusing system speed up is one of the enabling technologies to jump to mirrorless. It is still probably not good enough for a pro level sports camera, but it is a push in the right direction for most other cameras. That one new feature tweaked my interest... not as a need of mine, but more as an indicator of what's coming.
Pat





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