Comment 4 for bug 1544670

In the end, this idea is nothing new. Take a look at the competitors that we play catch-up with. *sigh*
How do they add app updates to the locked screen? (incoming messages and email, music being played, etc.)

There's nothing wrong with providing updates also via the greeter app, apart from the notification area. The greeter could theoretically be interfacing with the notifications. It could even be made a user choice whether to show updates in the greeter only, the notification tray, the audio tray, or all (default).