In case you missed it here is the full presentation of the Sony IMX492 sensor:
The Key specs are:
– 47MP multi-aspect sensor (41MP in 4:3 mode and 35MP in 17:9)
– Exmor R tech with electronic shutter
– Has 8k30p recording (in 17:9. In 4:3 it’s 25p)
– 2.315μm Pixel Size for both the Bayer and Monochrome sensor version
I don’t know if this is the sensor that will be used by the GH6.