This, friends, is the future of mobile apps continuing on its march. Augmented reality--the ability to overlay various data sets on a real-time view of your surroundings--will change the way location-based data gets presented.
Now, using the new iPhone 3GS's compass (sorry, older iPhone folks), app developers Acrosshair have put together a subway finder app for New York and London that overlays the direction and distance to the nearest station, depending on the direction you point your phone.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.