Definitely true on color! I think the long battery life of an e-ink device at 10.3 or 13.3 inches would give the iPad a run for its money in terms of usefulness

Definitely true on color! I think the long battery life of an e-ink device at 10.3 or 13.3 inches would give the iPad a run for its money in terms of usefulness, but totally agreed -- if you need color, e-ink is probably not the best choice.