We tried Android P DP1 on the Pixel XL and below are some videos and screenshots showing off the new UI and Changes in the Android P.
Android P Overview
Android P Animations in Slow Motion
Android P Screenshots
Android P New Features [Developers]
Indoor Positioning with Wi-Fi RT - Android P adds platform support for the IEEE 802.11mc Wi-Fi protocol—also known as Wi-Fi Round-Trip-Time (RTT)—to let you take advantage of indoor positioning in your apps.
Display cutout support - Android P offers support for the latest edge-to-edge screens with display cutout for camera and speaker. The new DisplayCutout class lets you find out the location and shape of the non-functional areas where content shouldn't be displayed. To determine the existence and placement of these cutout areas, use the getDisplayCutout() method.
Android P introduces several enhancements to notifications, all of which are available to developers targeting Android P and above.
- Support for images: Android P now displays images in Messaging Notifications on phones.
- Save replies as drafts: Your app can retrieve the EXTRA_REMOTE_INPUT_DRAFT sent by the system when a user inadvertently closes a messaging notification.
- Identify if a conversation is a group conversation: You can use setGroupConversation() to purposefully identify a conversation as a group or non-group conversation.
- SmartReply: Android P supports the same suggested replies available in your messaging app.
Multi-camera support and camera updates - You can now access streams simultaneously from two or more physical cameras on devices running Android P. On devices with either dual-front or dual-back cameras, you can create innovative features not possible with just a single camera, such as seamless zoom, bokeh, and stereo vision. The API also lets you call a logical or fused camera stream that automatically switches between two or more cameras.
Animation - Android P introduces a new AnimatedImageDrawable class for drawing and displaying GIF and WebP animated images.
Security enhancements - Android P introduces a number of new security features, including a unified fingerprint authentication dialog and high-assurance user confirmation of sensitive transactions.
You can check for more changes on Android Developer Website