Without a doubt, the person who picks Bing.com’s background image of the day have one of the best jobs at Microsoft. Especially since they don’t have to actually draw the photo, unlike the two painters who are responsible for the huge four-storey high Bing billboard ad in Denver. This 3-minute long time lapse provided by Branded Cities shows off their handy work.
From what I can tell by the changes in lighting, it took these guys around 7 days to complete the massive replica of the Bing.com homepage, photo, search box and links included. Assuming they only had just a small-scale reference image to work with, this is an impressive effort.