Google Earth Pro lets you fly around our planet and zoom in really close to areas of interest. I was able to see some junk in my backyard that I'd been meaning to clean up. A flyover tour of Tokyo is breathtaking.
CNet has a good article about the features the pro version offers:
- Advanced measurements: Measure parking lots and land developments with polygon area measure, or determine affected radius with circle measure.
- High-resolution printing: Print images up to 4,800 x 3,200 pixel resolution.
- Exclusive pro data layers: Demographics, parcels, and traffic count.
- Spreadsheet import: Ingest up to 2,500 addresses at a time, assigning place marks and style templates in bulk.
- Movie-Maker: Export Windows Media and QuickTime HD movies, up to 1,920×1,080-pixel resolution.