Sony's global shutter sensors are far more advanced than Canon's. The two aren't even on the same planet right now. Canon doesn't even have the facilities to mass-produce a stacked sensor such as what Sony is doing.
You seem to argue 1) Canon can't make them and 2) Canon is making them only for the video cameras :-D I don't think both arguments will prove to be correct.
BTW I've worked in Japanese engineering since like 1992, and there are often cases where firms don't make the parts they design or even the goods they design. The microprocessor company ARM for instance subcontracts
all of its manufacture out. iPhones famously are made by FoxConn in China. Unix workstations I worked on the operating system of shipped with three name tags from one production run. In a later job I was a purchasing agent for Toshiba, Hitachi, and Sony buying Motorola PAL's they needed for their own goods. Despite these firms making PAL's themselves, and being competitors with Motorola, they couldn't make the high-end PAL's so my team at Omron basically acted as a purchasing agent, hiding from Motorola the fact that the ultimate customer was their big competitors. I don't see any reason why it's utterly and totally out of the question Canon might do something similar.
If Canon lacks production capability for something they've published papers on and now are rumored to be manufactured, then either 1) they're building capability you don't know about, or 2) they're not making it themselves. Neither possibility would shatter my world.
Canon's high DR sensors are all around video related applications. End stop. Every patent. Usually it's about automotive applications these days.
There's nothing out there that suggests these patents (or tech) will every be used for stills cameras.
You seem to insist that the video and stills worlds have absolutely no overlap, and that's simply not true now if it ever was completely true in the past.
Cameras are clearly used for both, ranging from the iPhone up to the R5.
You're arguing basically that users of a camera that is stills capable, just absolutely, positively, under no circumstances whatsoever that could ever be imagined in the history of the universe, might want a global shutter or more DR or auto ND.
I'm not predicting all sensors from the two worlds will merge.
But as a stills shooter, I can see advantages in global shutter,
and 20 stops dynamic range at times, and even if not suitable for all possibly imaginable subjects,
and in-camera ND ability.
I'd
totally buy that camera.
So, if this sensor
does end up being used in a film camera, they'll make at least one sale. And it sounds like I won't be the only one.
Something else to consider is that it might simply be a special model, at least to gauge reaction. While it might be too expensive to engineer an entire camera around this sensor, it may make quite a bit of sense to make a special model of the R1 or what have you. Just as they used to make the EOS-1 and EOS-1RS (with pellicle mirror), or later the EOS-1D and EOS-1Ds, they might make two or even three versions of the R1. Again they might make a slow hi-res version and fast lo-res version, but also a slow hi-DR version. If the sensor's seeing use in cine cameras, then they basically have done the R&D for free. And if the body's seeing use in normal-sensor cameras, they've got the body for free. There will be some work making a model with this sensor, but perhaps little enough to either make a profit, or at least use it as a halo model.