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Wait what
 
Join Date: Feb 2005
Location: El Dorado County, California
 
2013-10-05, 15:52

iCloud backup only backs up app and media library metadata, not the apps and media themselves; otherwise, the backup set could quickly become unmanageably large. When you restore, the apps are reinstalled from the App Store as usual, except that their metadata is already present from the backup, so they'll be in the same state they were in when the backup was last completed.

Missing apps can be reinstalled on your next iTunes sync, assuming that they're still present in your iTunes library, and their data should still be there as well.

What annoys me most about iCloud backup is that passwords and stored network settings aren't included, nor does there seem to be an option to encrypt the backup to include them (as there is for local backups in iTunes).
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