Two iPhone apps use Wikipedia content for "augmented reality"
Two augmented reality apps for the iPhone were released this week that use Wikipedia content to provide information about a user's surroundings. ReadWriteWeb reviews Cyclopedia, a new app that costs US$2, and Wikitude, a free app that was previously available for Android phones. According to the ReadWriteWeb article, both applications require the newest iPhone, the 3GS:
That's because the 3GS is the first iPhone with an internal compass—Augmented Reality (AR) apps use your phone's GPS to know where you are and the compass to know which direction you're looking at. Then these two apps can tell you what you're looking at that's written up in Wikipedia.