The first Kinect prototype cost Microsoft $30,000 to build, but 1,000 workers would eventually be involved in the project. And now, hundreds of millions of dollars later, the company has a product it can sell for $150 a pop and still turn a profit, Mr. Mattrick says.

http://www.nytimes.com/2010/10/24/bu...t&st=cse&scp=1