Why do I need a password if I have a phone?

According to what this gadget's homepage say, it would be possible to buy bus tickets (the Spotcode in the pic) or even remotely control some of our domotic electronic devices at home. It uses multimedia handy cameras to recognise a 2D coded symbol, letting us do what that SpotCode allows to.
They show us some examples of use both in Bluetooth or GSM/GPRS mode.

[Listening: 80s v. housey - mr. blair - (45:30)]

Edit: Lurking around for examples of this technology I have discovered that the 2D code used depends on a third company Bango