If you have content that is tied to a different console then the one you're currently using, you still need to use the DRM tool on XBox.com. If all of your content is properly tied to the console you're using pre-upgrade, the transfer tool will transfer the licenses automatically.
Best way to check is to turn on your XBox, sign out of Live, and see what XBLA games show up as only demos, etc.
Best way to check is to turn on your XBox, sign out of Live, and see what XBLA games show up as only demos, etc.