i personally don't feel e-ink technology is fluid enough yet. It's just so clunky to navigate, turn page, the page refresh is too slow as well. I did the eye test at the store... read to the end of the page, hit the button and move my eye up to the top again as if I turned the page. It was only halfway through the 'refresh' when my eyes reached the page starting point. Apple Tablet isn't a great solution because its still backlit LCD.
I wonder if there's some way to combine the screens... it's a backlit LCD until you hit a button and the backlight goes off and it becomes an eink screen.