I know there was a news report about electronic paper, which used e-ink, and could be used as a phone, or e-reader, or computer. It was a prototype if I remember correctly but I can see them appearing in 5-years or so. One piece of paper with all your e-books on.
Here is one of the news articles:
http://abclocal.go.com/kgo/story?sec...ogy&id=8121952