I saw that they use namespace in some example of using indexeddb: http://www.html5rocks.com/en/tutorials/indexeddb/todo/ or http://greenido.wordpress.com/2011/06/24/how-to-use-indexdb-code-and-example/
Are there any real benefit of doing so? Is it just for organize the related object?
Simply (AFAIK), to prevent name collisions and polluting parent namespaces.