When will the Win9 preview release?

When will the Win9 preview release? I believe that many of the disappointed friends of Win8 are waiting for the arrival of Win9, the first and we meet must be Win9 Technology Preview version, then the Win9 preview version when released it? below and small weave together to understand next.

It has been established that some of the tech media have received an invitation to Microsoft's September 30 press conference, and there may be more new news about Windows 9 at the event. If all goes well, the Windows 9 Technology Preview will be open to developers first, while the public preview will be available to the public around October. Until the spring of 2015, the final consumer version may be listed with the new Intel processor.

As for the price, Russian media Wzor said Microsoft is considering free Windows 9, but ZDNet's source is just the opposite, claiming that Microsoft will provide OEM manufacturers and consumers with different versions, the price of Windows 9, the continuation of the previous Windows 9 pricing strategy.