Augmented reality is fast becoming a reality for mobile search apps of all stripes. Layars, which calls itself a "reality browser," was one of the first of interest to pop up on our iPhone radar. Not long ago, Yelp oh-so-quietly added its own way to slap its content over the world you see through your camera lens. The "monocle" feature originally surfaced as a hidden gem within Yelp 3.0. Now, in Yelp 4.0, Monocle has earned its place as a permanent feature on video-enabled 3GS iPhones.
Expect to see many more augmented reality apps pop up on a variety of mobile platforms, including Android and BlackBerry. As if on cue, a few days after Yelp's latest release, Zagat pushed out a similar feature for its competing restaurant and nightlife app, Zagat To Go 3.0.
Get a taste of Yelp's Monocle augmented reality mode, and of Yelp 4.0's other improvements and additions in the First Look video above.