The project as a whole aims to save more than 68,000,000 kw/yr. This equates to 5,000,000 fewer miles of highway driving + 50,000 fewer barrels of crude oil + electricity for 2,500 average Chicago homes + 10,000,000 lightbulbs saved. At least according to the project directors.
AS+GG Architecture are also building a new 50 story luxery hotel next to the tower, and transforming the space below into a vibrant public plaza. The Sears Tower will also be renamed the Willis Tower.