Again, I'm not arguing for Canon/Nikon to avoid this market, but it makes some sense that they let this chaotic primordial ooze of a market evolve further before trying to conquer it.
there is nothing chaotic in the mirrorless market. Definitely less so than in the artificially crippled, "marketing-differentiated" world of DSLRs. Batteries, Battery grips, external WFT-Wifi bricks ... all of them totally incompatible even within one manufacturers line of cameras! Canon offering 5 different APS-C mirror-slappers in parallel - 1200D, 100D, 700D, 70D, 7D/7D II at the same time .. Nikon running 3 different APS-C DSLRs, all with the same sensor in parallel and moving towards 5 different FF DSLRs in parallel- D610, D810, Df, D4s + one new rumored. And to make the mess even worse ... all of these grandfather-DSLRs "video-optimized", although mirrorless cams will always win the video game. Naturally. No mirror to be flapped out of lights' way all the time! :-)
Now where's the primordial ooze? The mess. The clunkiness. The mirror-slappin. Fat, greasy, old and heavy 19-century mechanical tech stuff? Looks rather like Jurassic Park to me. Soon to go extinct.