Layar’s Augmented Reality location based service (LBS)

"Constellation Research, Inc. estimates these services to grow and generate up to $10.7B in revenue by 2013. Among the early adopter set, LBS is on fire. Among the general population, growth will most likely trend with smartphone adoption, which market research firm IDC estimates a 55% growth from 2009 to 2010 (~270 million units).

Navigate around places. Use turn by turn navigation and traffic maps through services such as Google Navigation and Yahoo! Maps.
Identify events to attend. See where my friends are by date and location to make time to catch up using Loopt, Rummble, and Tripit.
Locate friends near me. Catch up with people near me using Foursquare and Gowalla as a matter of convenience. In some cases, track people by mobile device location.
Reduce traffic fines. Warn and be warned where speed traps, sobriety check points, and cameras through crowdsourcing apps such as Trapster and Phantom Alert
Find places to eat. Follow foodie friends to see where they check in on Yelp.
Receive offers from merchants. Get rewarded for checking in to locations with discounts from merchants. Take advantage of M-commerce (mobile).
Finding people. Skill levels, experience, interests are key attributes. Imagine a nearby emergency scene that requires a Portugese speaking medic within 5 miles.
Finding things. Parking spaces, meeting rooms, stolen phones are key examples. Imagine the need to optimize parking space management, finding empty conference rooms, etc.
Tracking resources. Passive sensors can locate objects with AutoID devices, RF Tags, and other signals. Imagine tracking of truck fleets, taxis, doctors, service people, equipment, etc.
Notifying people and objects. Both a push and pull model can be used to match needs. Imagine automated check-ins, targeted advertising, safety warnings, automated payments, etc."
http://www.enterpriseirregulars.com/31472/monday%E2%80%99s-musings-why-i%E2%80%99m-unplugging-from-location-based-services-until-the-privacy-issue-is-resolved/