As it currently stands, Canon has (in the world of 135):
1. not the highest MP camera
2. not the highest DR camera
3. not the best high ISO camera (for the time being I'd not count on a camera with an unknown release date, there has been no evidence either for speculation, particularily high ISO raw-s)
Canon is supposed to have soon:
1. the fastest performing camera (12fps, AF)
2. the best high ISO camera ?
What seems to be interesting is that the 1Dx is, mostly being a sports camera, also the new 1Ds.
The 5D2 successor, supposedly a good candidate for a high MP camera, was not that either.
Is anyone seriously thinking Canon thinks they need no high MP camera with its IQ characteristics? There is generally no need for such a camera? There is nothing missing in the Canon lineup?
This disparity means for one thing that if Canon had used its current sensor technology in a sensor of about 36MP or more in 35mm format (pixels about 7D sized or a bit bigger), its performace at low to moderate ISO speeds would have shown a distinct disadvantage compared to what Canon could easily predict was coming from Nikon and Sony.