Is this a sign from Microsoft? As they stop the Windows XP support the company releases the first update for Windows 8.1. The Windows 8.1 Update is a cumulative update that includes all previous released security updates and non-security updates.
In addition to previous updates, it includes improvements such as improved Internet Explorer 11 compatibility for enterprise applications, usability improvements, extended mobile device management and improved hardware support.
Microsoft requires this update to be installed for all future security and non-security updates for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 updates. This means you really have to get this update for your Windows 8.1 installation and should not skip it to avoid hassles later.
The Windows 8.1 Update 1 Download is available in the Microsoft Download Center starting today. Via Microsoft Knowledge base: KB2919355.
Watch below the overview of the Windows 8.1 Upate.