Actually, it's the other way around. When we stop liking mirrors, then Canon will stop refreshing lenses in EF mount.A couple observations that have gone unnoted in the discussion:
1) Whether you like mirrors or not, when Canon opts to stop refreshing lenses in EF mount, it's game over.
It would be very stupid for a sensor maker not to make money on sensors for automation these days. A market for medical imaging is not that big.2) If you make more money on medical imaging than on cameras, your technology research emphasis will be on resolution, detection, optics, materials and a bunch of other things that really matter to those most important business lines. One of the areas not stressed is processor speed.