There are several 'organic' type sensors in development (Panasonic, Fuji, probably others) that combine some of the advantages of film and digital sensors e.g. for less light angle sensitivity and better DR. Some of these are expected to hit the market in 2015/16, and that could be a big step up in sensor technology. There may be other technologies that enable a jump in performance but as others have mentioned, it would be strange if Canon introduce this while the 7D2 with the old sensor technology hasn't even started selling. Announcing an exciting product that isn't available in the near future is risky ...