Here's a practical use or two...
Your phone is in your pocket and you get a txt come in while your working at your computer; to save you digging for your phone the txt appears on a little popup with the message and a reply button. You click the button, write your reply and send it; all the while your phone was still in your pocket.

Perfect for when your in a meeting or just don't want your boss to see you're on the phone texting all day!
Posted via BlackBerryForums.com Mobile