The article goes through a list of 13 killer features in Windows 8.1 and for each feature it explains “Why we like it” and “How to use it”
Here are some of the features listed in the article:
Start button: The Start button has returned to its original spot on the desktop taskbar
Desktop Mode boot: Now the user’s who still want to have the old look and feel of Windows can choose to boot their windows to desktop mode directly, skipping the new Windows 8 start screen
Snap view: The biggest change in Windows 8.1 is the expansion of the “snap view” feature that enables multiple apps on the screen at the same time.Windows 8.1 will let you run up to eight apps side by side — up from just two in Windows 8.
Start Screen organization: You are now able to name groups of tiles giving the screen an added sense of order. Instead of pinning every newly installed app to the Start Screen, Windows 8.1 now just adds new apps to a larger list of apps one menu level below. That helps cut down on the chaos of the Start Screen, making it just about the apps that matter to the user.
For more details: here is the link to the article: http://money.cnn.com/gallery/technology/2013/07/01/windows-8-1-features/index.html