Dpreview published their Photokina interview with Canon. Here are some interesting quotes (see also the main points from their interview with Nikon):
New high-MP sensor and mirrrorless product(s) are coming soon:
Q: Currently no Canon camera offers more than 22MP. Do your DSLR customers ask for higher resolution?
A: Yes. We know that many of our customers need more resolution and this is under consideration. In the very near future you can expect us to show something in terms of mirrorless and also a higher resolution sensor.
The sensor inside the new Canon G7x camera is probably produced by Sony (both the Powershot G7X and Sony RX100M3 have a 1″ (13.2 x 8.8 mm), 20.9MP sensor inside):
Q: One thing we’ve learned is that the sensor in the G7X is not made by Canon. Does this represent a new philosophy at Canon?
A: We select the best sensor, whoever the manufacturer is. That’s our policy.
Check out also dpreview's interviews with Sony ("we still need to create more lenses") and Fuji ("a full-frame camera would be bigger, more expensive and maybe slower too").