We first broke the story earlier this month that Canon was planning a major firmware update for the Canon EOS R5 this year. One of the likely features coming to the Canon EOS R5 is “pixel-shift”.
What is Pixel-Shift?
Pixel shift is a method in digital cameras for producing a super resolution image. The method works by taking several images, after each such capture moving (“shifting”) the sensor to a new position. In digital colour cameras that employ pixel shift, this avoids a major limitation inherent in using Bayer pattern for obtaining colour, and instead produces an image with increased colour resolution and, assuming a static subject or additional computational steps, an image free of colour moiré. Taking this idea further, sub-pixel shifting may increase the resolution of the final image beyond that suggested by the specified resolution of the image sensor.
https://en.wikipedia.org/wiki/Pixel_shift
It looks like Canon is going to be bringing this to the EOS R5 this year. It looks like Canon is calling this feature “IBIS HIGH Resolution”. This feature will combine 9 shots to make a 400mp image.
The IBIS High Resolution image will measure 24576 x 16384 pixels!

Beyond the new pixel-shift feature, we do expect further advancements to come in the new Canon EOS R5 firmware. We expect to see this announced in the next 30 days.
More to come…
Any word on the fps being given options with elec shutter?
Also does that mean these are still expected to happen?;
400 MP sucks, 1 GP would fit the ego ;-)
And what I would be really happy to see is (finally) the addition of C-Log 2, at least in the R5 C, but it would be a welcomed addition on the R5 too (or all cameras if we are at it).
But great for all those (thinking they're) needing it ;)
So, in principle, the information from the lens' IS circuit can be re-used for a 'hand-made pixel-shift".