Sony may now be larger than Panasonic -- I was using the latest Financial Times list that I could find, which ranks Panasonic as 364 in the world, and Sony as 376. There's something odd about these lists, as Fortune lists Sony as 97 and Panasonic at 114...I suspect in those lists, they disregard certain kinds of services attached to each company. FT simply takes everything into account an comes up with a number. In any case, the two companies are quite close to the same size and have roughly the same capabilities, though Panasonic has lately trended toward more hard manufacturing. I don't know whether that's a plus or minus in terms of making cameras. Sony sensors are excellent, of course, but their cameras are somewhat ham-handed, even compared to newcomers like Panasonic.
I don't understand why (I'm not being sarcastic, I really don't understand) why 4/3 aspect ratio would be a handicap in video cameras, given the excessive numbers of pixels in FF cameras, when compared to even 8K needs. Most movies are made in post, rather than in camera, and I would think that an aspect ratio larger than 16:9 would be an advantage in editing a final video, rather than a handicap. Wrong?