Giving virtual goods physical features: Dokobots

Dokobots is a new iphone geogame that is a real life pokemon/treasure hunt. What makes this game's technology unique is it adds a virtual layer to the real world by forcing players to walk to physical locations to collect robots. It's built on top of Google Maps. These robots have physical characteristics, and can be dropped off where the user chooses or sent on flights all over the world for others to pick up.

What are your thoughts and reactions? Is this a new genre of gaming/game that improves on location based games?