This is one of the most brilliant things I've ever seen in my life. It reminds me of when Steve Jobs first announced the iPhone.
A little piece of software was created to plot your prefered destination on a map. This is then uploaded via USB to the shoe. The GPS is powered by a battery similar to those found in mobile phones. The data from the GPS in the left shoe wirelessly communicates with the right shoe which shows the progress made on a row of lights.