New Amazon-exclusive features like X-Ray for Movies, X-Ray for Textbooks, Immersion Reading, Whispersync for Voice and Whispersync for Games.

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"This could easily be the product that beats the iPad particularly for those of us who are readers, easy and innovative in design and use, with unique features like X-Ray which allows you to become far more intimate with what you are reading, " said Rob Enderle, principal analyst at the Enderle Group.

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"X-Ray has been one of the most loved features on Kindle Fire HD since it launched last September, " said Peter Larsen, Vice President, Amazon Kindle.

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Brushing the surface of rocks with Curiosity's dust removal tool first enables the arm-held hand lens camera and X-ray spectrometer, in particular, to see features that might otherwise be obstructed.

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Plenty of features have been carried over from the last-gen model as well, including X-Ray, which lets you find characters, places, topics, etc. spaced throughout the book by searching on a given term.

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