This article is wrong and never contacted Bookeen, as I was told by Bookeen.
Look again at the article:
Although we will not see this technology in an e-reader anytime soon, Bookeen informed us that this video destroys the battery life and will only give you 3 or 4 hours of video playing.
Update Feb 15 2011
Bookeen was kind enough to get in touch with us regarding this video and shed a ton of light on what is going on during this tech demenstration. Claire Jennesson has this to say about the video;
3)In this mode Power consumption is comparable to a standard LCD but WITHOUT backlight. So not that much in fact.
Contradictory isn't it?
The first part, they never contact Bookeen despite what they say, the second part, they just copy past what Bookeen told us, without modifying the first part.