Size is not so much of an issue for me. I've tried a number of compact cameras and some are simply too small (the GRD4 is about my threshold). It's the weight that's more of an issue. Carrying my Olympus E-5 + ginormous f2 zoom lens was a burden. So a larger M43s camera will offer improved handholding size (for larger hands) but with the weight benefit of M43s lenses.Even some mirror-less cameras are beginning to get some size. The Panasonic GH3 appears to be almost as large as my Nikon D7000, and I do not consider the Nikon a compact.