One of the members at DPReview aptly named YouDidntDidYou posted slides from an Olympus presentation in the DPReview forums (link). The first of these slides demonstrates the growing market share of mirrorless cameras (Micro 4/3, Sony NEX, Samsung NX, etc) amongst all interchangeable lens systems (including DSLRs) in countries throughout the world: Above: On the right axis, you can see the countries listed in order from greatest mirrorless market share (top) to least (bottom). Japan (JPN) leads the list with mirrorless market share approaching 50%, while the United States (US) is dead last (less than 10%). All countries show increasing mirrorless market share over time, with Asia and parts of Europe leading the way. Of note, mirrorless market share is up around 25% in the United Kingdom (UK). In the second slide, you can see that Canon and Nikon are becoming less dominant in the Japan market, while Sony, Olympus, and Panasonic have all shown significant gains since the introduction of their mirrorless systems: The last of the three slides shows that market share for the Micro 4/3 system in Japan recently surpassed that of all other interchangeable lens systems (labeled here broadly as "DSLRs"), including the Canon EF mount and the Nikon F mount: A few additional comments about the above slide: Sony E mount (NEX) and Sony A mount (DSLR) are analyzed separately, otherwise they would be contending with Micro 4/3, Canon, and Nikon for the top spot. There seems to be some very optimistic extrapolation of Micro 4/3 marketshare beyond July 2011 (or someone's kids got a hold of that slide ). Regular (non-Micro) Four Thirds market share hardly registers on the graph.