You now have the ability to show vast sweeping landscapes, so do it. Cityscapes, fields and roads are waiting for you to record them.
Just because the action is going on 60 feet from the camera doesn't mean you can't add visual elements in the foreground. Someone getting in or out of a car can help set the scene for a busy New York street. Or you can use birds eating in a park, children playing, anything to liven up your shot. You don't want the foreground image to overpower your point of interest, but you can use the foreground to keep a rather static shot, such as two people talking on a bench, more animated.
Every time you watch a movie shot in widescreen format, pay attention to what the director of photography is doing. How is he using his screen real estate? What is he showing and how? The ability to view critically will be one of your greatest teachers.
16:9 is a whole different ballgame from the old 4:3 format. You have more screen to use and in different directions. Use it wisely.
Contributing columnist Kyle Cassidy is a visual artist who writes extensively about technology.
Composition Tips for 16:9
Standard and Widescreen, what's the Diff? A Primer on Aspect Ratios
Video Lighting: High Definition Lighting
HDV: High Def Value
JVC GY-HD100 Digital Camera Review
Shooting a la Mode
What is HDV?
Camcorder Review:
Digital Cinema: How to Make Your Mini DV Look Like Film
Videomaker's Video Composition eBook