The above ad is from Swedish carrier Halebop, which we're told is owned by Telia (the largest carrier in Sweden). We've also been informed that, roughly speaking what is being said in the commercial is "Dark and cold outside? Then I think it's time for a surprise, a mobile that is also social".
Certainly using the Lumia 800's colors against the black and white snow gives a great contrast and is quite eye catching.
Source: Wingadget SE