yes. kyobo is the market dominent company in the korea book market. it will not be broke out

. but in korea, there are a lot of ebook sellers with different drm policies. that's why korea ebook market is too small.
it's very hard to choose one ebook reader because which book seller will sell the book that you want to read. and bought one works only in the specific devices. in this situation, android OS supporting device is a good choice. if you do rooting with it, you can read any books that you have bought from different ebook stores and borrow most books that are selling now in ebook stores from free ebook libraries. I am just talking about Korea ebook market.
if you want to have more information, search it. there are lots of information about this device. but its selling will only be vaild on 29. June, korea time.
good luck~