I already don't like that the navigation-gesture bottom bar takes up a few millimetres of my valuable screen space. Why does it need to be one click away and always wasting space as opposed to one swipe away and not? Hopefully it will be an option and not an Apple-style "we've decided for you" arrangement.
Time is a flat circle. I remember when honeycomb launched with a bottom navbar, only for Google to delete it later in favor of a (terrible) phone like gui