Barcode labels in everyday life

I think it would be a great idea to incorporate barcode label printing in to more everyday life. I think soon they will incorporate it in to our luggage on planes. Just think of the time it would save at the check in desk? Would be none of this hour long queing. Have seen that the iphone has app's that you can download to scan and compare prices of food online, as well as an app that tells you the content of the food. Great start, just hope they keep developing the idea! Would really like to see what you guys think!