Today Facebook finally took the wraps off Home, a suite of apps and a home screen replacement for Android phones. It's not just a new UI for launching apps however; it replaces the lockscreen with Cover Feed and prioritizes updates from people instead of apps. There is a standard paginated launcher, that is always just a swipe away. But the focus is on the full-screen images that are your new welcome screen. These are status updates from friends that you can easily flip through and double tap to like when someone posts something exciting. Plain text status updates are placed over a user's cover photo, to keep the appearance consistent with photo-centric posts.
Notifications are presented as small cards, which Facebook applies an algorithm to, in order determine the updates that are most important to you. Just like with the standard Android UI you simply swipe notifications off screen to dismiss them. But, if you want to remove all of them in one shot, you long press a single notification and the rest will be drawn to it and you'll be able to dismiss the entire stack.