Windows 8.1 Update

We’ve made it so your mouse works more consistently anywhere in Windows. If you move your mouse to the top of the screen when using a Windows Store app, you will see the familiar Close and Minimize buttons. And as I mentioned above, when you move your mouse to the bottom of the screen in a Windows Store app, the taskbar comes up.

On the Start screen, if you right-click on an app tile, you will get a context menu next to the app tile that shows you what you can do with the tile, like unpin from Start, pin to the taskbar, change the tile size or even uninstall the app. Right-clicking on an app tile on the Start screen works just like right-clicking on something on the desktop.
Simpler way to find new apps:

After installing the update, you’ll find the Windows Store is now pinned to the taskbar by default so you can easily discover new apps (yes, you can unpin it if you don’t want it there).

And after installing new apps, you’ll notice a message at the lower-left corner of the Start screen that points you to the Apps view so you can see what you recently just installed.