The speculation is based on the assumption that Canon’s new sensor might be based on the same 4.2 micron pixel design used for the sensor in the Canon EOS 70D and EOS 7D Mark II. This would translate to 52MP when applied on a full-frame sensor.
52MP would be a good marketing argument, considering that Sony/Nikon sensors reach 46MP. If true, Canon is on the way to win the megapixel race. We will see.[via NL]