This is one of the items that is tested in your Windows 8 App when you use the WACK.
If you are in Southern California, please email this post for more information on getting a token for your app by June 30, 2012!
If you want your app to stand-out, liven up your tile and leverage secondary tiles to provide extra convenience for your users. There are lots of ways to have your tile stand-out, most of them do not require a service. If you want to learn more, here are some great options to differentiate your tiles:
Tile updates Badges Secondary tiles Periodic notifications Scheduled notifications. Push notifications