many big companies and organisations, especially for advertising campaigns
more handy is the Wikitude app, also for Android handsets, that turns Wikipedia into a location-based service
Say goodbye to tour guides...
Eye Toy camera for PlayStation 2 was probably one of the first commercially available AR games
Eye of Judgement for PS3 making use of the PS3 webcam to bring to life a turn-based card game
Sekai Camera for the iPhone
Google Street View on Android phones is also an example of AR in use. Thanks to a built-in compass, Google satellites can see where you are and even which way you're facing, to bring up the relevant Street View image.
SecondSight shows how AR could become a much bigger resource in the future, especially for printed ads
enough interoperability to be able to include Android, iPhone, Blackberry, Palm and computer users all together, no matter which AR client they happen to be using
Layar takes the sort of GPS POI data in current map-based apps, like ATMs, houses for sale, or nearby hotspots, and displays them overlaid on the landscape as seen through the camera lens.
A magnetometer, used to power Apple's compass app and future turn-by-turn navigation software in the 3G S, would also be necessary (Android phones have compasses already).