The app version comes with a much more cheerful video:
Here's how it works according to IKEA:
The 2014 IKEA catalogue gives you the ability to place virtual furniture in your own home with the help of augmented reality. Unlock the feature by scanning selected pages in the 2014 printed IKEA catalogue with the IKEA catalogue application (available for iOS and Android) or by browsing the pages in the digital 2014 IKEA catalogue on your smartphone or tablet. Then simply place the printed IKEA catalogue where you want to put the furniture in your room, choose a product from a selection of the IKEA range and see how it will look in your home!