I've already seen this kind of discussion on here, but that was several months ago. However, it's a really interesting feature in my opinion. My background is quite a colourful photo of Shinjuku, Tokyo. And no, it doesn't distract me from playing ;)
http://www.findingmidnight.com/images/Tokyo-Rooftopping-Shinjuku-Street.jpg
http://www.findingmidnight.com/images/Tokyo-Rooftopping-Shinjuku-Street.jpg