Do we know for certain that the hardware cannot run full resolution at video frame rates? that the sensor can't be read at those rates, etc etc?
Well, maybe you do. And maybe it's true that the new M can't target a different window in the sensor data. It's a bummer, as this is a very useful capability, and one I hope they address in the future.
Nothing's perfect, unfortunately or otherwise...
I guess I'll just keep my GXR which does this particular trick so very well.
There's enough other goodness in the new M to motivate me towards a purchase in the next year or two anyway. And maybe they'll have updated it to solve this lack by then.
Back to the Lens Insights ... sorry for the diversion.