Windows 8 Users Have a 2 year 'Window' to Update to 8.1
 

For whatever reason users of Windows 8 who do not wish to, or not see the benefit of immediate transition to the new Windows 8.1 system, Microsoft has your back at least for the next two years. After that time, you can stand in the line with the Vista and XP users. "Windows 8 customers will have two years to move to Windows 8.1 after the General Availability of the Windows 8.1 update to continue to remain supported under the Windows 8 lifecycle."

http://www.hardocp.com/news/2013/10/...o_up date_81/