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Following on from the 'PC-free' ethos, iPod touches, iPads and iPhones running iOS 5 no longer need a PC or a Mac to perform software updates or synchronise their iTunes. All they need is a Wi-Fi connection and users can update or synchronise their iTunes and operating system wirelessly.
Newsstand allows users to download magazines and newspapers from the iTunes App Store. Newsstand is similar to iBooks in a way, but allows you to download up to date magazines and newspapers in the App Store. You can read all kinds of content straight from your iOS 5 device -- as though you were reading it with that magazine or newspaper physically in your hand.
Not the most important of features, I grant you this, but having native dictionary support is something you will miss once you don't have it. From nearly any application, you can select and highlight text and "define" it with iOS 5's included dictionary, allowing you to look up words and find out what it means.