Saw this on DSInsights and was very impressed. Hold a box of LEGOs up to the kiosk, and the screen will show you what's inside.
It's kind of like a simulated X-ray machine just for the product. Of course, it also shows the models that can be built from the particular LEGO set, and probably has a few other functions as well.
I know I'd certainly have a hard time pulling myself away without holding every single box up to the machine :)