Over the last few months the Geospatial Revolution Project from Penn State has created some great short documentaries about the use of GIS in our daily lives.
To quote from the site:
"The mission of the Geospatial Revolution Project is to expand public knowledge about the history, applications, related privacy and legal issues, and the potential future of location-based technologies"
The final episode focuses on monitoring global climate change, preventing famine, tracking disease and mapping communities never before seen on a map.
The other three episodes are: