Hi-tech Puzzle

I am a big fan of using technology in education. Information and communications technology (ICT) is tailor-made for application in education. What I don’t understand is why some people are going on about the use of “wireless, low-orbiting satellite, fiber-optic” communications in the context of education. Those hi-tech channels are clearly required when the information is dynamic and real-time, such as in the case of market information and sports events. But what does one gain by beaming down static information — say, history or physics content — as opposed to delivering it as a book (if the information is purely text and pictures), as a DVD if it is audio-video-text, or as content on a hard drive (if the content is rich as well as interactive)?