Wow, are you in any way involved with pedagogical theory? Do you actually know anything about how children learn? Are you doing anything other than assuming that elementary school learning in other countries is somehow just a poorly funded version of the U.S.?
Printing a whole ton of elementary school primers in Swahili, or Maya(yes people still speak it), or any other language that has a limited amount of speakers compared to English is a resource consuming endeavor. To be able to simply write it and have it show up on their computers allows them to have much more content available than if they were stuck hauling books into every school.
As for the wireless network, that's been built into the computer as a mesh network, which means that one child, or a teacher, can connect to someone who has the latest version of a textbook, or even a text that was not available to them prior.
And while you may want to pretend that civil war tears through every "third-world nation" on a regular basis, that simply isn't the case; and certainly not on a level that causes massive infrastructure damage.
The problem with University books, and it is a problem, I know, I've been there, I'm bitter about it too, has nothing to do with this project. This is about providing a different sort of education.
Ultimately this has a broader goal as well, providing the tools for people who have as yet not had them to develop a level of computer literacy that will allow them to have a level of knowledge on par, if not better than, the modern information powers. There is no good way to get an education on how to use computers than by using them, especially at a young age. I imagine that is how most people here on slashdot learned to use the things.