While this article highlights Sony in the Mirrorless Camera Market it really is about the growth of Mirrorless cameras in the United States which was one of the slowest markets to embrace these smaller, lighter systems over Dslr cameras.
I was a very very early advocate and supporter of the mirrorless cameras starting with Panasonic and Olympus in the Micro Four Thirds format. I moved from there to the Fuji X system where I have stayed and am extremely happy that I did.
Friends of mine have added the Sony A7 series to their gear lists and are slowly moving away from the big and heavy Dslr cameras and relying on their highly capable mirrorless cameras. Major manufacturers like the Big N and the Big C seem to have been left behind do to their failure to recognize the future.