You may now finally download the latest version of Android if you’re using a Nexus 5x, Nexus 6P, Nexus Player, Pixel C, Pixel, or the Pixel XL. You may enroll your device to the Android Beta Program in case you don’t want to manually flash your device.
Android O is still in beta and it doesn’t have an official name yet so expect a lot of bugs and things that needs to be resolve in the developer preview so I highly suggest that if you use your smartphone a lot, do not update to Android O DP yet.
Android O has a lot of new features made for productivity such as new notifications systems, better settings, better copy pasting and autofill support, picture-in-picture, and a lot more.