This self cleaning sensor thing seems like a great idea but I'm curious as to how effective it'll be. Once the camera "shakes" off the dust it has to go somewhere. That somewhere is still right there in the camera..even back onto the sensor. Perhaps I'm not understanding this correctly but it does seem like it may lengthen the amount of time between the manual cleaning of the sensor but won't there just be more dust in the cavity to clean up? Not trying to knock Sony or anything just curious.