A library in the palm of your hand?
I'm not sure I'll be reading from one of these things in ten years time or less, but e-books are said to be the way we'll read books in the future, and there's some big money going into producing e-book readers.
Read: The Future of E-Books - Forbes.Com.
UPDATE: For obvious reasons this has turned into a 'what-are-you-reading'' thread. Feel free to add yours in the comments.