Technologies 2: Bing Maps
`Augmented Reality today is possible because through the combination of GPS + Compass your location and direction are determined. Data can be added to coördinates, so when your GPS+Compass device is in range of these coördinates it will show this data. The problem is that GPS chips are not very accurate. There is another way.
Google has the streetview technology. If we have software that cross-references images of what you see with this streetview database (kind of like how Shazam cross-references the music you hear with their music-database) we can accurately determine what your position is. Google plans to do so with Google Goggles.
Microsoft is working on similar technology. After Bing Search, they created Bing Maps and Bing Explore and Photosynth. Their getting pretty good at it. With Photosynth microsoft can now create streetview perspective from user-generated content. So Microsoft doesn’t have to drive through every city with a camera mounted to a car, all the photo’s people shoot get synthesized together to make a streetview perspective. What they can do with this? Check it out, it’s amazing.

