The Windows 9 Preview may not come out until October, even though the reveal event is scheduled for September 30. Paul Thurrott claims the technical preview for the new operating system won't come out until October, despite the date for the reveal.

Microsoft's first reveal event for Windows 9 will be targeted at developers and early adopters. A full, finished version of the operating system is not expected until 2015.

Microsoft will likely have future events targeted at regular consumers once a consumer launch date gets closer.