That is the start of the future of APS-C with its gradual move into the consumer arena. Imagine a mirrorless 7D equivalent and then wonder if there is a future for the DSLR 7D as well?
There already is, and it's called the NEX-7.
Sure, it's expensive, but it's there, it's APS-C, it's 24MP, and from what i've read, IQ isn't so bad either.
I love my 7D, but if I could go on a holiday, take one do-it-all-zoom (like EFs 15-85), a wide prime (like zeiss 21 or canon/samyang 14), and maybe a portrait (like my Takumar 50/1.4 is the size of a niftyfifty), I could leave the 7D at home and not worry about the weight.
I'd still keep the 7D, shooting birds on live-view is too hard (although i'm sure i could practise more) but mirrorless is the future for travel.
ps, M9 is MILC but not EVIL. M10 is rumoured to have live-view, then it will be both...