The future in e-Ink and other e-paper type technologies maybe outside the traditional reader realm. Many Kohl's stores are using Altierre's b&w LCD version, but according to this article & press release, Altierre has also shown off an eink option:
http://www.nytimes.com/2013/02/10/te...ight.html?_r=0
http://www.altierre.com/pr_e-paper.html