Cortana, released from the shackles of the Windows phone, now arrives to assist on other Windows devices, like the tablet and PC.
One of Cortana's new tricks is forecasting the weather.
At-a-glance information of all the information Cortana collects is kept in the Notebook, like stocks and scores, and calendar appointments and travel details.
Voice controls let you draft and send emails, saving your hands some daily toil.
Here, Joe Belfiore, Microsoft's vice president of the operating systems group, demos voice dictation in real time.
The new Spartan browser also gets a piece of Cortana. Here, it autofills the URL/Search field with information pulled from travel confirmation.