I already read about 40% of new books on my Nokia n810 and all it has is a 4.1" diagonal, 480x800 resolution screen. If there was a 5" foldable color high res epaper screen, like the 2011, 3rd generation of something like the readius, I'll likely never buy a paper book again if there are options.

In addition to any other benefits, I'm really looking forward to the flexible, foldable epaper screens, so I can carry a 5-6" screen in a small combo device. I'm certain that I won't have to wait for more than 3 years for this.