From Paul Thurrott's Supersite for Windows:
"Threshold" to be Called Windows 9, Ship in April 2015
At the BUILD developer conference in April 2014, Microsoft will discuss its vision for the future of Windows, including a year-off release codenamed "Threshold" that will most likely be called Windows 9. Here's what I know about the next major release of Windows.
As a kind of recap, we know that Microsoft will update Windows 8.1 in 2014, first with a service pack/feature pack-type update called Update 1 (or GDR1 internally). I wrote a bit about this update recently in Windows 8.1 Update 1 (Very Early) Preview but the expectation is that it will ship in April 2014 alongside Windows Phone 8.1, the development of which Microsoft will soon complete.
Also in April, of course, is BUILD 2014. That show will hit just weeks after Microsoft completes its corporate reorganization and will surprisingly be very much focused on Windows Phone and Xbox, according to my sources. But I think Windows watchers will agree that the biggest news from the show will be an announcement about Microsoft's plans for the next major Windows version, codenamed "Threshold."
Paul offers this reason for the stepped-up timetable:
Windows 8 is tanking harder than Microsoft is comfortable discussing in public, and the latest release, Windows 8.1, which is a substantial and free upgrade with major improvements over the original release, is in use on less than 25 million PCs at the moment.
Still running Win7 on all of my systems except for three boxes running XP (software specific requirements). Took one look at 8 and said NO!
