Nokia City Scene is a prototype app from Nokia Beta Labs that combines street maps, 3D panoramic views with gesture navigation and social network integration to provide what appears to be a powerful map discovery tool.
Nokia City Scene lets you explore in 3D
A user can transition from a top-down conventional street view to a Google Maps Streetview-like panoramic view with simple gesture-based navigation. In this 3D panoramic view, the phone user can read information about the businesses in the area in a text overlay. Check-ins by friends on Facebook and Foursquare is also available. The following cities are currently supported within Nokia City Scenes: London, Dallas, Denver, Las Vegas, Los Angeles, Newark-Jersey City, Philadelphia, San Francisco and Seattle.
It is somewhat unfortunate that this powerful tool is only available for the Nokia N9 which is based on an orphaned mobile platform, the Linux-based MeeGo. Nokia has not said whether this app will be ported to Windows Phone (its current smartphone platform).
Voice source: Nokia Research Center