After texting on the iPhone for awhile, you get used to seeing the “…” bubble mid-conversation. Whenever someone with iMessage is typing to you, the ellipsis bubble appears in that thread of the Message app. It helps you know that whoever you’re talking to is about to respond, and it also gives people away when they choose to start an iMessage and then stop.
What if you could see when someone was sending you an iMessage no matter where you are in iOS? The iPhone’s status bar would be the perfect place to display such a notifier, wouldn’t it?