Augmented Reality apps are starting to appear in the App Store and the segment has a ton of potential with the advancements in GPS and camera technologies on smartphones like the iPhone.
Augmented Reality (AR) combines real-world and computer-generated data in real-time and the apps are impressive.
Tom Hesser mentioned a few AR apps after this week's PowerPage podcast that I thought were worth mentioning here:
Layar Reality Browser (free, pictured) displays real-time information, such as houses for sale, shops, tourist information and concert information as pictured in the screen shot.
Wikitude (free) also allows you to see the world through the iPhone's camera, but overlaid with Wikipedia content.
Yelp (free) secretly added a new monocole feature (video demo here) which overlays their reviews in real-time over the video feed from your camera.