Tesco wants to promote the "scan to cart"

In Britain, the supermarket chain Tesco has released an m-commerce application with a very useful function, that could be described as "scan to cart$".
App can order all products fairly conventional, using categories and a search function. But where the brand innovates, it is in its function "tagging": just scan the barcode of a product with the camera for its smartphone that it is automatically added to a shopping list. Then it only remains to validate the cart and pay to have it delivered in either.

The concept is explained in this spot pretty funny:

And computer graphics: