[ProDigit]

From the video on the first page, it is clear they are using an LCD screen without backlight on a white background.
The reason of low contrast is the polarization filters.
This is something PixelQi is fixing in their screens.
The color mode faces the same issues as PiQi's screens, in that the colors are washed out.

The resolution is higher than ebook readers, most likely greater than 1024x720 pix, but I have no concrete numbers.

I find a device like this the right size to read most pdf files available.

I also think that because the use of a regular TFT screen on a plastic layer (to make it bendable) brings with itself more issues (like scratches on the plastic, breaking pixels, plastic layers splitting after a while, ...).
All reasons why we probably won't see a device like this soon in the stores.