Go to a store and try the Nook Simple Touch. The page flips are not anything like what e-paper gained a bad rep for with the latest tech.
But I still doubt there is much of a future in the current e-paper though. On the other hand I doubt the future will belong to current LCD either since it has horrible flaws as well. There is work on e-paper to make it color and update fast enough for video. There is also OLED and several other promising display techs working their way out of the labs. Most will fail and it would be difficult to predict which one will surmount the technical problems first, achieve mass production and thus get cheap enough to dominate the others. But it is a safe bet that one will because the demand is there for an energy efficient display without the side effects of the current leaders.