As rumor has it Windows 9 may be available as early as the fall of 2014. An RTM version may be available sooner for MSDN subscribers and possibly on TechNet before it closes its doors.
Lets hope Microsoft includes a fully functional “Start Menu” similar to Windows XP, Vista and Windows 7 and not another simplified “Start button” similar to Windows 8.1 or sales may mirror Windows 8 poor market share performance. Putting “Aero” back in may also be a smart move. Compared to Windows 7 in the same time frame Windows 8 / 8.1 has only about half of the share that Windows 7 did and 7 had to contend with the mighty Windows XP users in doing so.