Should wireless carriers be dropping mobile app stores for their own brand?

Knowledgeable smartphone owners will know right away that their Palm Pre, BlackBerry, Windows Mobile, or Android device is missing the specific operating system application store when they see only a Verizon store on their devices. I think new smartphone owners may not know there are operating system versions and may actually like the Verizon store. One benefit is that the consumer can go to Verizon to handle all of their software issues, which actually may end up being pretty costly for Verizon. Another consumer benefit is carrier billing for apps. With the rumor that Verizon may eventually get the Apple iPhone, it doesn't seem to make much sense for Verizon to spend time and money with this effort when there is no way Apple is going to take off the App Store to put on the Verizon store.

Do you think wireless carriers and device manufacturers should just stick with their operating system store or do you think it is good for carriers to have branded stores?