I've been wondering how well an in body IS system would translate to a full-frame or aps-c body. With the micro 4/3's bodies the sensor is small, and the implementation doesn't add much (if any) noticeable bulk or weight to the bodies.
As sensor-size increases though, it may not be the same. If CaNikon could get in-body IS in their bodies without adding too much size/weight, you'd best believe they'll sell a lot more goddamned cameras then they already are.
But they wont do that, so they can sell the lenses more expensive with IS