It has an improved design and it uses newer screen technology from E Ink for the 6.8 - inch display. (the-ebook-reader.com)
Earlier this year Samsung VP Lee Woo - jong told Reuters that their company was going to invest over 1.4 billion into the development of new screen technologies. (goodereader.com)
Bezos said Amazon actually invented new screen technology for the super-white, ultra-clear and now self - lit ereader. (mashable.com)