Rumours out of Apple WWDC 19 talk about both Canon and Nikon 8K cameras being used to shoot ProRes RAW 8K footage for Mac Pro demos.
Footage from a documentary about Nikon ambassador Ami Vitale photographing Kenya was supposably shot in ProRes RAW 8K and the speculation was she shot with an as-yet unreleased Nikon Z9 with 8K output to an external recorder. Actually the documentary was shot on RED Monstro in 8K by Kiwi cinematographer Mark Toia of ZOOM Film and Television.
Meanwhile a Canon 8K camera resembling a C300 II is seen shooting props against a green screen for augmented reality demos on the new Mac Pro. This prototype has actually been shown by Canon before, most recently in 2018 at Inter BEE. The prototype has an 8K sensor and processor, but recording is external via SDI.
Indeed, Canon’s Super 35mm 8K prototype first dates back to 2015 and has been steadily developing since.