If you have been using the Windows Developer Preview, you would have noticed that accessing the charms bar when using a mouse can only be done by using the mouse-specific menu. This new shortcut will bring back the touch-screen charms menu, for use with the mouse!
You can access the touchscreen charms menu by pressing the following keys:
That shortcut should bring up the touch screen charms in the Windows Developer Preview, which may be convenient for those who prefer it.
You can also bring up the mouse charm menu by pressing WIN+C, which may be good for touchscreen users who can’t access the menu.