The next mirrorless camera from Canon is rumored to have a built-in EVF (the above pictures are a mockup). The first EOS M model did not come with an EVF because Canon felt that the current technology was not advanced enough. The company reportedly will not venture in hybrid or optical viewfinders for their future mirrorless models. The new EOS M camera is expected to be released towards the end of 2013.
Image credit: dlinney/dpreview