I would think that it might be much easier to get a used PC laptop for cheap in a developing nation than an esoteric machine like this. Plus, people there are often more concerned with survival and sustenance, so they more interested in a computer that can be actually used to generate some form of revenue (and software compatibility is a big factor here). Not to mention that previous initiatives like OLPC have failed to achieve any noteworthy success. And Raspberry Pi's are used by hobbyists and tinkerers mostly in the West, hardly in developing countries. So I kind of doubt this particular angle makes much sense.

Looking at the Balthazar project webpage it seems like one of the envisioned usage scenarios is the classroom... but from the rhetorics and promises it kind of sounds to me like it is done by a bunch of people stuck inside a certain ideology bubble. Very few people are interested in that kind of stuff and GNU apostles are unfortunately known for being rather out of touch with reality.