Think of this. You go to the local store, supermarket, etc and find an item you like. You need to know the best price available. Just click a snap of the bar code via ur mobile, and get the best price from ebay almost instantly. Maybe you can even order !
Amazon Japan Offers Barcode Purchases via Camera Phone
"Jesse James Garrett reports that Amazon Mobile Japan customers can purchase a item with their camera phones. "Snap a photo of a product bar code using your cell phone, and Amazon Japan will give you a price check," according to Garrett, relaying from this article in Ketai Watch (Wireless Watch). Here's the English translation from Babelfish"