Seadragon has the potential to eliminate traditional books.

I would love to see this technology developed more for text. I think this could really be the beginning of making the traditional book unnecessary. I am a visual and tactile learner. I like a physical book because I can quickly find pictures to reference, notes I made, etc. When I look at a computer screen and read a word file or a pdf, everything starts to look the same, I have no frame of reference, I am much more likely to stop reading, or just print it out and read it that way.
With this technology I could make notes in the margin (I use a tablet style laptop), highlight text, draw little reference markers or diagrams, and then when I am trying to find certain sections again later I can use those to drill down to what I need. Start broadly, zoomed out, and quickly scan lots of info until I find exactly what I want. Just like flipping through pages of a book. But this is obviously much cleaner and faster.