micro 4/3 is just a mirrorless sensor format. It is competing with other mirrorless sensor formats, many with full size sensors. I have mirrorless cameras with

micro 4/3 is just a mirrorless sensor format. It is competing with other mirrorless sensor formats, many with full size sensors. I have mirrorless cameras with APS-C or larger sensors, so the micro 4/3 format is just a smaller sensor.