Threshold to be named Windows 9 April 2014
Microsoft Windows Threshold plans to be revealed at its Build conference in San Francisco in April 2014
According to CNET:
Microsoft to name Threshold "Windows 9"
Attempts to unify the Windows and Windows phone
It will feature the 2.0 version of Microsoft's "Metro" user interface/design language
Windows Threshold plans:
To share common elements through inclusion of provision of updates to all the 3 Windows OS platforms (Xbox One, Windows, and Windows Phone)