Nikon Z7 has it for breakfast. About the only improvement over the 5D Mark IV seems to be substituting MJPEG for H.264. Not that it was overdue or anything! https://www.eoshd.com/2018/09/here-are-the-official-video-specs-of-the-canon-eos-r-full-frame-mirrorless/ About only thing I can hope for is that the 4K is somehow full frame and not a crop but I honestly just think it is a 5D Mark IV in a mirrorless body, looking at the specs sheet, rather than anything really new.