The geography PA thing has been frequently debated - there are two schools of thought (can't get enough vs. don't want any) that are mutually exclusive. Whatever is done will be right for some and wrong for others. A really inaudible or incompetent PA will guarantee upsetting everybody.
A moving map display on the IFE helps considerably. As an FA, very occasionally, I have broken into the IFE with a very short PA, along the lines of "Ladies & Gentlemen, sorry to interrupt your entertainment, but there is an excellent view of Las Vegas on the right hand side" and then get off and shut up. On other occasions, a simple cabin walk through telling folks seated on the right by a window of the same thing will do. Given that people can see you coming and pointing (with a smile) outside the window, explanation requiring removal of headphones is often not required - this method has the advantage of adding a more human and personal touch than a mass PA.