Canon's $980 M5 is an intriguing, but unconvincing mirrorless camera

I've been using a Sony NEX-5N for half a decade now. This gem of a mirrorless camera has served me well, and once augmented with a Carl Zeiss lens that cost more than its body, it's kept up with my photography needs admirably. But the 16-megapixel 5N is starting to show its age against fresher and sharper competitors, mostly those from Fujifilm's ascendant X series, and when I heard that Canon was finally getting serious about mirrorless cameras, my first priority at Photokina was obvious: