The Moto 360's black area at the bottom of its screen is much more noticeable to the eye when it is a sudden black contrasting section. This is particularly visible on lighter watch faces. If you as a global option to fade to black just above it (with a sub option for how many pixels high the fade will start), it will be much less stark and more natural. It will almost appear like a shadow. As Watchmaker will have this feature and stand alone faces will likely not, it will also increase loyalty to the WM app.