Skype App for Windows Phone 8.1 Allows In-Call Switch to Video

A new Skype app for Windows Phone 8.1 promises tight integration of Skype on mobile devices.  Windows Phone users will be able to easily "upgrade" a regular mobile calls to a Skype video call.

In addition, people with a Windows Phone 8.1 device can use Microsoft's new "Cortana" virtual digital assistant to quickly and easily start Skype calls: for example, just say "Skype, get Lara Kingwell on video".  Cortana will be included in a Skype for Windows Phone 8.1 update.

http://blogs.skype.com/2014/04/02/introducing-the-new-skype-for-windows-phone-8-1-and-improved-skype-for-windows-8-1
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