When you take a picture in the Bing Camera app the Bing app searches for matches in its bing shopping database and returns the result to you. I tried this out myself on a game, a CD album, and a book and got a result. The barcode scanner also works great. In addition you can check your twitter and facebook feeds through the app. Maybe I didn't see it before but shopping is on the app. If you connect the app to facebook your twitter feeds and your facebook friends will pop up in your search results if it is relevant.
From the app store
-Camera scanning of barcodes and cover art
-Connect with Facebook and Twitter accounts to set combined status updates.
-Show results from your social network when you search. Share search results on Facebook, Twitter, and through email.
-Expanded Shopping section with reviews ratings and prices.
Additional clips and trailers in the Movies section.