A feature I am personally excited about is being able to create a public link for others to see your board or even a specific column. It will always remain updated, the user will just need to give it a refresh.
You can also use this to access a board or column on a mobile device.
Public Boards: Simply click on 'Share board' followed by 'Create link' 😎
Public Columns: You will need to click on the column settings, followed by 'Share', and 'Create Link'. That's it, you are all set!