The only way to get the American market (which drives global product decisions, make no mistake) to move more rapidly to DSLM, would be to offer mirrorless cameras that are
bigger and
heavier than the DSLR models. 'cos, y'know, folks, bigger
is better.
Say if Ricoh (formerly Pentax) releases a Micro 645 mirrorless body, as big as a 1DX, for $4500-$5000, with adapters for Canikon lenses to take 44mm circular (ok, cut off at 33mm high) image files (that can be cropped to portrait or landscape or square later -- no need to rotate the camera between shots) .....?
heh heh.... The US buyer will be thinking "Wow, it's huge, it must be the best, what a game changer etc, gotta have one" (remember, this is the country whose top 3 selling new cars are all pick-up trucks).
But IMHO the biggest problem, in getting Canikon to change, isn't the market acceptance of mirrorless, it's the fact that all their lenses are designed to optimize PDAF. And, although some hybrid sensors are out there, it kind of cripples some of the AF advantages of mirrorless via CDAF. So Canikon, to deliver true high performance DSLM systems, will need to issue new lenses. Like µ4/3 did. Canikon will be loathe to do that.
I don't think it will be a pitched battle over ten years. I think there will be a tipping point, followed by a rout. Exactly what the tipping point will be is something for speculation.... but it will come, and might only be clearly identified during the rout.