1. I like this overview a lot. Concise and collecting info otherwise dispersed. An angle not mentioned enough for me: high-end compacts and size+usability+price tradeoffs with mirrorless (though I understand this deserves a separate topic).
2. Background: I use both a Nikon DSLR and a Panasonic LX3, looking for a newer camera. With 28-200 zoom the mirrorless will be about as large as D40 with similar reach - not pocketable - comparing to P7100. Also, for high-end compacts you can get 24mm on the wide end (S100, LX5) with 90mm+ on the far end - not easily available on mirrorless, esp. for the price.
3. Mirroless IQ is not be better than DSLR and the lens are not smaller (enough to matter) for frequently used zoom range. Within this scope mirrorless sits slightly awkwardly between high-end compacts and small DSLRs. There will be always some market segment when the _current_ mirrorless will be a good fit, but many amateur photographers will not be in it, I suspect.