But how does Cortana work? As of right now, Cortana is an app; it’s a simple app that opens up the personal digital assistant where you can then either type in your question or ask verbally inside a smallish window. It's not a full screen experience like you see on Windows Phone.Source: Neowin
The app itself currently looks similar to that of Windows Phone, but takes up roughly 25% of your display with Cortana being in the center; Cortana maintains her circle shape and is animated too.
Cortana is expected to integrate into the OS as well, much like she does on Windows Phone, but at this time the deep integration into Windows Threshold is slim but there are plenty of time for improvements.
Windows 9 to feature Cortana as a desktop program
Posted on Wednesday, August 13 2014 @ 12:58 CEST by Thomas De Maesschalck