jaayres20 said:
What is the possibility of Canon releasing a higher end ESO-M with the sensor from the 5DSr lets say a year or so after the 5Dsr has been out? Mainly thinking of something to travel with. Obviously I would have to find a smaller lens that still would resolve well enough to make it worth while.
If you are thinking about a FF sensor in the M, it's not possible as others have already answered. The M mount will only cover an APS sensor. So the odds are more like "What is the possibility Canon will roll out a new FF mirrorless system and would it include the 5DS sensor?".
Good points!
If you are talking about using the same technology to create a denser APS sensor for the M series, the M3 already has it. Pixel pitch (micrometer/pixel) for the 5DIII is 6.2, 5DS is 4.1, M is 4.3, and M3 is 3.7.