Dent Reality, a company looking to create practical applications for augmented reality, has released a video preview of their first offering Retail AR:
Retail AR can improve the customer experience and boost sales, by surfacing product details, displaying spatial information and navigating customers to relevant areas.
Be sure to watch the video. You'll see its practicality immediately. I think the app will be useful on a phone, but imagine it built into some glasses? I hope more companies like Dent Reality spring up and I'm positive that they will.