Kindle (and other wireless reading devices) creating a paradigm change?

Jaimie Prideaux posted at her blog "Talking Books Librarian" about kindle2. (I like the message "Still amazing only better" ^^) With that device you can store 1200 ebooks (which you buy at kindleStore, of course) and read newspapers and papers before newsstand (reminds me of the e-paper in "Minority report"). Will devices like kindle, Sony Flexible Full Color Paper Screen, PlasticLogic, Linux-based FirstPaper etc. create a paradigm change? How long will it take until it is common to use such "devices"? Imagine how fast Gameboys or Laptops were disseminated. The question is: When do the libraries have to adopt these technological changes? Until now there is enough time to monitor these developments...