mclaren777 wrote in post #17570787
I think AF technology could get there in the next 2-4 years and EVF tech could match OFVs in the next 5-6 years, but battery tech is still a long way from giving mirrorless cameras the same stamina as traditional DSLRs.
There isn't anything distinct about the battery 'tech' between mirrorless cameras and DSLRs. The only difference is physics: the size of the batteries. Mirrorless cameras draw a bit more because of the electronic viewfinders, but its a tiny OLED (which are very efficient displays) screen. If the true bottleneck to mirrorless adoption is battery life (which it isn't), then the solution is simple: use bigger batteries. i.e. the a7II has a larger grip, which could probably house a larger battery.
An even simpler solution is to simply carry more batteries. I've shot weddings and have travelled with my a7r....battery life has never been an issue, because changing batteries is not an issue. I can change a battery much faster than I can change a lens, and if space is an issue, I'd rather carry an extra battery or two, than lug a bigger body around.
mclaren777 wrote in post #17570787
Plus, once a company like Canon gets into the FF MILC business, it will probably be another decade before it has a respectable selection of dedicated lenses that rival what they currently have for FF DSLRs.
Which is why many people aren't waiting for Canon/Nikon and are transitioning over to Sony. As much as Canon likes to believe the market revolves around them, history has shown us that a market leader can only leverage their position for so long before the rug is swept from under them and the market punishes their unwillingness to adopt new technologies. Just ask Microsoft, Blackberry, Blockbuster, etc etc.
The fact that it takes so long to build a portfolio of lenses only compounds that risk, because as you said, it can take years to develop a line-up of lenses. Sony has aggressively filled out many of the lenses people would want in 16-200mm focal lengths in a mere year and a half. Every year that Canon waits puts them even further behind.