Here's a brief overview of what's new:
A full overview of what's new can be read over here.
Quickly creating an event directly from the Calendar flyout on the Taskbar. Better managing notifications, including a new button at the top of the Action Center and the ability to sort notifications by most recently shown. Integrating OneDrive content online with traditional indexed results in the File Explorer search box. The navigation pane on the Start menu now expands when you hover over it with your mouse to better inform where clicking goes. Using your voice to activate third-party digital assistants from the Lock screen.