I think they will be an increasing used tool in the future. I think it is safe to assume that the number of smart phones are on the rise as well as the ability to integrate the web into everyday tasks.
I scan barcodes all the time at stores to get more info about a product or check prices. I was watching a story the other day about how Best Buy has almost become a showroom for online shoppers. They go play with the product in the store, scan the barcode, and buy at a cheaper price from Amazon.
We also may get further integration with QR codes. For example, you see a private treaty sale in a magazine, you scan the QR code and it adds the date to your calender as well as opening your website to photos of the calves.