Microsoft Previews Windows 10

There is no Windows 9. Via USA Today:

Microsoft on Tuesday lifted the veil on the next version of Windows: Windows 10. At an event in San Francisco focused on corporate users, Microsoft previewed early elements of the next generation of its iconic computer operating system. It represents the first step in a whole new generation of Windows, said Microsoft executive Terry Myerson. The company said it will focus on one Windows product family across devices. Its corporate users will find Windows 10 "familiar, compatible and productive," Myerson said. Microsoft's Joe Belfiore gave a demo, focused on the core experience in how the PC "is evolving." There are live tiles, familiar to Windows 8 users, but also elements familiar to Windows 7 users, which is far more widely deployed. The Start menu and task bar are front and center.