Well, that oversized Kindle didn't become the textbook killer Amazon hoped it would be, but at least one country is moving forward with plans to lighten the load on its future generation of Samsung execs. South Korea announced this week that it plans to spend over $2 billion developing digital textbooks, replacing paper in all of its schools by 2015. Students would access paper-free learning materials from a cloud-based system, supplementing traditional content with multimedia on school-supplied tablets. The system would also ena