Notifications are getting a lot more robust in Apple’s next release of OS X. Starting in 10.9 Mavericks, notifications will become interactive, allowing users to perform simple actions like replying to iMessages, responding to FaceTime calls, and deleting emails. And for the first time, push notifications from iOS will start showing up in Notification Center as well. Any message that would normally show up on an iPhone or iPad lockscreen will now appear on the desktop too. Those notifications will finally sync between devices as well, so users can clear an item on their phone and have it disappear from their computer as well.
To help users field all of those new notifications, Mavericks will also include a feature called "While You Were Away," which will collect and summarize all of the alerts that a user missed while their computer was asleep.