The book I'm reading (listening) to right now is, The Perfect Thing by Steven Levy. It covers the rise that handy little gadget, the iPod, and how it's transformed more than the technology culture today. How the simplicity and usefulness of this device has made it as pervasive as the car or television.
The important point of the book for me is the idea how something that didn't seem to be a big deal - a portable music player - would create such a following. It would expand well beyond the original design and has become so much more.
We received a grant in my district to improve literacy, so we purchased 500 of them. The impact for students and staff is measured by how many beg us not to take them back at the end of the year. They've become such a part of their daily routine they couldn't image life without one. I know I couldn't.