In dollars per potential readers, there's no comparison. There are drawbacks, of course. Adequate computer facilities are hard to come by. Most schools concentrate their computers in laboratory-style rooms that must be shared by the entire school body. Scheduling adequate time for several full classes to use such facilities is next to impossible.
Students are woefully ignorant of technology.
Even students with access to computers at home don't seem to know how to use them or what they're capable of. Unfortunately, the solution to these problems is simple. Money for facilities, money for maintenance, and money for training. Of course not. The current trend in educational reform is away from breadth of content and towards depth of experience.