Certainly, such a policy will provide a significant boost to the IT sector in South Korea and the ministry points out that digital textbooks will be cheaper than printed versions.
South Korea like most if not generally all of east asia, is hyper focussed on school but not on "education". All the long hours in class, the high pressure on grades and the after school tutoring for hours, is just a monstrous rat race where the public never questions whether they're getting an education or getting triaged/streamed into high and low achiever careers. Basing education on grades alone means you in fact get fewer creative people succeeding and only the dull little memorizer students get ahead. The east asian system has a lot of racist/admiring stereotypes plastered onto it as an amazing, totally superior system to the mess in America...but it isn't hard to find stories by intelligent east asians who find it a really crappy system.
This is just another example of the students getting served last while government tries to find another way to "govern" (here helping the IT sector with govt investment) while the kids are fodder.
I love these ereaders and the web. But for learning, still nothing beats having paper in your hands, along with those computerized tools. This is just going to lead to national carpal tunnel, kids who all need glasses by 15, reading so much LCD text and a general hyper anxiety about always needing to "get to internet connected terminal" so you can look at your texts, notes and papers.
It's bad enough for the eyes to be twittering and chatting so much on a video screen. Moving and still images are far less strenuous. Imagine reading and reviewing under stress, your entire math text, your boring history text.
They are not to be imitated. But I'm sure opportunistic pols over here will soon be telling a gullible public that we need to "be like south korea" and digitize all education.