I also don’t know why single-use devices such as Kindle or Nook will ever match what one can do with a light-weight laptop or handheld computer. This was a core problem with the Rocket Ebook, which was the first commercial reader I’m aware of.

Also recently saw a tech review of the Nook in New York Times, Business section, B1, December 10, 2009 that detailed the early release problems, the worst of which is 3-seconds to turn each page.

I think the future of electronic document reading will be better served by lightweight laptops or tablet devices on which one can run regular Adobe Reader or other proprietary readers with more freedom.