If you just can't wait to see what that empty plot of land with the construction sign on it will become, then you are definitely going to want to download the 'Walkabout3d' app. Developed by U.K.-based Deliverance Software, the app is designed to let you see what an area would look like if conceptual buildings were built.
The 'Walkabout3d' app works by using designs found in Google Sketchups, a program that "lets users create 3D images or 'models,' which, in the case of buildings or structures, can then be placed within Google Maps." You can create your own avatar to explore the conceptual designs while still viewing the real world. I can only imagine how much time could be spent exploring conceptual designs all around the world's major cities. The app is out now and is available for the always nice price of free.