The 4k/120 fps is probably cropped line skipped, as it does not mention full frame there. No problem with that. Also, I think many people do not realize that it will not have full width raw 4k video recording (I wonder why Canon keeps writing "RAW", as it is not an acronym. I understand it may have registered something like "Canon RAW", but without any qualifiers it should not be written in capital letters) , as that is, of course, not possible. And also, as the 6k raw video is a recording format, not a delivery format, it really should not that much matter if it has 17:9 or 16:9 or even 3:2 aspect ratio. You'll probably downsample and/or crop it anyway for delivery. (By the way, there is no "6k DCI" or even "8k DCI" that I know of. Current official DCI spec v. 1.4 only defines 2k and 4k resolutions. And a lot of other things related to movie delivery.)