Windows 8.1 Update 1 tweaks include a title bar at the top of Modern/Windows Store apps; new, right-clickable context menus; and the addition of power and search buttons on the Start Screen. Windows 8.1 Update 1 will have a smaller footprint (1 GB of RAM; 16 GB of storage), which will enable device makers to put Windows 8.1 with the update on smaller, cheaper tablets. Windows 8.1 Update 1 will include IE8 compatibility mode in IE11 -- previously reported as IE11 Enterprise Mode.
With Windows 8.1, according to previous reports, boot to desktop will be installed by default on new PCs/devices without touch screens. Users who are upgrading from Windows 8.1 to Windows 8.1 Update 1 who don't have boot to desktop set as their default already won't see their settings change to boot to default, according to WZor.