I came back to this forum after several months. Interesting reading.
I can say as a user of both DSLR and mirrorless, that main advantage of MILC is not the size of the camera but AF (reliability, accuracy, coverage of AF points) and WYSIWYG. There will be people who never accept EVF but there will be less and less. The size and weight of the MILC system (at least with wide and normal focal length) are, of course, pleasant.
AF speed difference between DSLR and MILC disappears for both single and continuous AF. A big game changer will be the global shutter, coming in ca 2018. It will have an impact on flash sync speed and faster image analysis for better continuous AF.
So what will remain as main differences between DSLR and MILC? The mirror and power consumption. Is it enough?
I don‘t think that Pentax will introduce new MILC mount for (APSC or FF) with a whole new line of lenses. Q, K and 645 are simply too much. Pentax (is) was an excellent lens producer, but when you look at a number of new lenses in recent years, it’s simply not enough for a new mount.
I believe, that MILC becomes mainstream. I can imagine that Pentax brings K mount MILC but flange distance will always influence its form factor. 645 MILC with its ca 70mm flange distance would be already strange...
Last edited by Jan67; 04-06-2016 at 11:26 PM.