The idea seems sound, the design however makes it look like somebody stuck a cheap chinese ebook reader on top of a highly priced designer laptop...
I think implementations like this one could very well be a good idea since there are some areas where eink just can't compete with LCD or OLED displays. If you want to read books or just review some text-based info, the eink panel is ideal. For data-entry, websurfing, video, games and all the other "multimedia" stuff the "normal" laptop display is still far better I guess...