Mango brings with it the ability to do augmented reality on Windows Phones since you can access the camera and the gyro and compass sensors. Jared Bienz of Microsoft has shown off the Geo Augmented Reality Kit that will be on CodePlex soon. For developers, he states that you can write an AR app in as little as six lines of code and he even has a nice demo showing restaurants in an AR field and their ratings as you drive by. Just take a look:
Can’t wait to see the AR apps that this leads to.