This is historic, of course, because it marks the first time a stock M can be used as a TTL (through the lens) camera. The potential advantages are obvious. Macro photography (without a Visoflex or the like) becomes accessible, telephoto photography views can now fill the frame and precise focus can now be set directly by eye (using a magnified electronic view and focus peaking at the same time). It also gives the M an excellent means to work with adapted SLR lenses including the Leica R optics (via a dedicated Leica adapter), tilt/shift lenses, etc. Additionally, it opens the M up to video use.