What's a Geographer doing in Med School?

This is what:

TEDMED: ESRI on Health and Place

I saw a similar presentation at the ESRI GIS and Health conference back in 2007. Things can get a lot more specific than the County/MSA level shown. After doing health histories last weekend at the AMSA Health Fair it made me better appreciate how this information could help piece together a diagnosis... thoughts? Anyone seen anything like this in practice?