While Cortana is relatively new to Windows Phone for those who have official access and support, newly released videos show how the company has been working on the virtual assistant for some time. Project Louise kicked off back in 2010, the same year Windows Phone 7 originally launched, and displays similar functionality presently available in Cortana today. What's more is one of the videos shows how the assistant can also work on Windows 8.
Full story from the WPCentral blog...
Full story from the WPCentral blog...