I've tried the fujifilm mirrorless cameras, and they've also had that feeling of portable camera with a computer attached. I've personally always loved the feeling of a computer engine driving the sony camera (a7 evf is wonderful).
If mirrorless is the future, and partially what allowed Sony to make 1/32000 possible, then does that mean Canon/Nikon are playing catch up?
Hard to say. My guess is that an EVF is a trivial add-on and both Nikon and Canon are capable of executing well and would have added it to their SLRs if they wanted. Why they're clinging to the mirror... I have no idea. I certainly prefer optical viewfinders but I can't claim I'm in the majority.
Frankly, the modern photo equipment is just too good to even imagine a dramatic leap forward by one player. ISOs have skyrocketed, dynamic range is amazing, AF is fast and intelligent, etc... One major area worth improving is the weight IMO. If someone defeats the laws of physics and produces an optical equivalent of 24-70mm f2.8L mounted on a 5D, but at 30% of the weight/size, it would be an instant hit.
If mirrorless is the future, and partially what allowed Sony to make 1/32000 possible, then does that mean Canon/Nikon are playing catch up?