I'm still waiting for background process indicators.
Essentially, if an app is actively navigating (Like maps or Navigon) it gets a little circle icon (Like the notification number in the top right) in the top left with the navigation arrow. Likewise they could add ones for general background processing (a gear), background downloads (a spinning activity indicator?), music (a quarter note) and any of the other "active" background modes.
This would help immensely to help users distinguish apps that are actively using resources in the background versus ones that just have a saved state. Also there are still many apps that don't implement background downloads, and so when I leave the app during a download the only way to tell if it is continuing is by opening the app and checking if the progress bar has moved.
what's wrong with the universally known play symbol for music that's been there forever?