iOS 8: App Store Updates Do Not Clear
In iOS 7, the apps listed in the "Available Updates" screen of the App Store will be cleared the moment updates are synced over from iTunes. However, in iOS 8.0.2, the list is not cleared after being synced with the updates.
Even if this is something new in iOS 8, where the updates will be listed for a few days or weeks, the badge still shows the number of updates available when the apps have been updated.
iPhone 4S, iOS 8