We reported back in May when a new beta of the Chrome browser for Windows and Chrome OS was released that this version came with a richer notification experience outside of the browser. Notifications pop up on the desktop and can contain formatted images and texts, they also support direct actions such as replying to an email from the pop-up itself. There will be a notification center that will house all missed notifications, this center has been made available to the public today. It supports alerts from browser extensions and as well as apps.
Currently there aren’t many apps that use Chrome notification center’s API, but its only a matter of time before popular apps are updated. The apps supported right now include Gmail, Google+, Calendar and a few experimental ones. Google has said that this feature is going to come over to the Mac, but they’ve haven’t given a specific time-frame. They are looking in to notifications for Chrome on mobile platforms as well, but a release isn’t expected in the near future. Support for Linux is also said to be on the way.