Windows DreamScene is a utility that allows videos of the .wmv and .mpg format and other optimized animations to be used as desktop wallpapers. It is one of the many Windows Ultimate Extras offered for Ultimate editions of Windows Vista. Prior to its official announcement, DreamScene was rumored to be in creation under the names Motion Desktop and Borealis. After several months of testing, the final version was released on September 25, 2007.