It's important to remember that this camera enters a market segment where there are only four competitors, the Sony A9 (+grip), the Nikon D5, the Canon 1DX II and the Nikon D500 as an outsider. I won't go into advantages and disadvantages of the different cameras, and the preference are highly individual. Also, there are too many uknowns about the Olympus yet, both with regards to specs and new lenses to be released. However, for my own needs, should I consider entering the sports photography field again, and considering my age, the alternatives would be this or the D500, simply due to the weight and size of high end telephoto lenses. I don't need the shallow DOF of a full frame sensor and I rarely if ever need the light gathering abilities. If the E-M1X offers exceptional video capabilities, particularly with regards to slo-mo (240 frames 1080p/120 frames 4K would be nice. The GH5s does 240/1080p but "only" 60/4K), it's a certain winner.