More Windows Phone 8.1 screenshots leak, confirm on-screen buttons and separate volume controls

The Windows Phone 8.1 update is approaching, and with it Microsoft will pepper the somewhat bland interface with new options. We already had a notification center leaking out, now two more screenshots appear, showcasing more goodies are in store. First off, they confirm on-screen buttons will be possible with the WP 8.1 update, so that theoretically phones can be made more compact, moving the navigation keys on the display itself... Drop you comments and additions..Below