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