Canon falling behind ??

[neuroanatomist]

...I will give Canon until the spring to come out w/ a M2 otherwise there is an A7 in my future.

I was initially thinking along similar lines. However, the EOS M won't be FF, and it will almost certainly be much smaller...and size is the main reason I got the EOS M in the first place. Quick scaled comparison of the EOS M, Sony a7, and 5DIII:

While the a7 is certainly smaller than my 1D X, the EOS M + 22/2 fits in a small belt pouch. The a7 body is larger and over 0.5" thicker, and the 35/2.8 is also over 0.5" longer, making the total package a lot less portable.

Food for thought...