Foursquare is a neat way to keep your friends appraised of your location and activities, as is the custom in this day and age. With the help of Samsung, you can now see all your Foursquare check-ins through a living timeline called Time Machine. Even if you don't have a Foursquare account, check out the demo. It's really cool.
Time Machine is an aerial view of your check-ins laid out chronologically.