[kirillzubovsky]

Interesting idea, but what would they display on this button?

It a way, this is such an old technology. Remember the old flip phones with a secondary screen on the front, displaying time and showing you number of new text messages? Maybe something like this, but then again, why?

[wietsehage]

If it where a small high resolution oled display (32x32) they could show an app icon for when attention is needed for this specific app. You could have a little Facebook icon slowly fading in and out as an extension tot the notification center.

[kirillzubovsky]

Interesting, I guess they could, although personally I'd disable that feature immediately.