Wrapper as a concept, is key to the intro for this section. There's a template that exists, with menu indicators, annunciator rows, titles, etc. They all have their place, and you should only eliminate them under certain conditions. Generally, I think you at least allow access to, say, the annunciator row (or equivalent) so you can always find out alerts, status, battery, signal, etc. if you need. Why be surprised when in camera mode, for example?

Patterns