Our local instance of Drupal 8 is similar to Drupal 7 when first viewing the site. You will note the default Bartik theme with the friendly Drupal drop logo and a tabbed main menu. It is here though where the similarities stop. Drupal 8 has been reworked from the ground up, including a brand new responsive layout and admin menu.
One of the nice new features of Drupal 8 is the rebuilt admin menu. Everything has been moved under the Manage menu item. The admin menu itself is responsive and will change from text and icon to icon only, as soon as the browser is resized to tablet screen size.