[loxs]

While it's indeed interesting to geek out on this and I am not to say that we shouldn't be moving in this direction if we can... I don't think this is the limiting factor for this technology. Energy efficiency is already good enough with e-ink. For me more important is to try and build bigger (and cheaper) displays with higher resolution. For these I would sacrifice some energy efficiency.

[int_19h]

On the broader market, you're right of course, as evidenced by the fact that many people read from regular phones or tablets. I'm mainly curious about how far this single parameter (power usage) could be pushed if desired.