Recently, a number of rumours have surfaced regarding the traditional Windows start menu that many users have grown to love returning in the Windows 8.1 update, formerly known as Windows Blue. According to The Verge, the start button in Windows 8.1 may not have the same functionality as in other versions of Windows. After the Windows 8.1 update, clicking on the start button would supposedly bring up the original Windows 8 'Start' screen, and would not include the start menu.
If this is the case, the Start button would have little function, as hovering the mouse over the left corner of the screen would have the same result. This would likely irritate many users holding back from purchasing Windows 8 due to its lack of start menu. As of yet, this is only speculation, however it would be a shame if Microsoft chose to implement the easy option instead of providing a resolution to many users' complaints.
Source: The Verge