for Canon: evolutionary ... at best.
many others: revolutionary.
2015 will likely bring mirrorless cameras with APS-C and FF sensors that finally surpass DSLRs in every single aspect of imaginge capture and imaging. It will be a revolutionary move in the history of photography. From pseudo-analog digital camera-besats (DSLRs) to truly digital, fully electronic, solid-state, mechanics-free imaging. Looking forward to it.
What's your issue with a reflex mirror that enabled you to optically view through your lens ? Would a camera that had interchangeable finders satisfy you; one pentaprism the other a high quality EVF that is interchangeable with the pentaprism and automatically locks the mirror up and the camera uses DPAF for autofocus ? Or would you still complain about the depth of the body being too fat ? ( I can sympathise with anyone finding some bodies to hold as too fat but not necessarily cameras).
An APS camera can hardly be described as having a 'flappy mirror' anyway. If ever you'd used a Pentax 6x7 I think you'd have dissolved into hysteria.
I can understand those that like the shooting experience without a mirror, it's a very subtle 'snick' compared with the dslr's 'thwack', but it's not something that I can really get excited about. As for mirror vibration damaging the IQ ( which only happens at very specific shutter speeds anyway - about 1/15 th ) - just use live view or mirror lock up on a dslr.
I can't help feeling those those who really resent mirrors so much don't like what they see when they look in one .....