If only contents were ceated on open systems, nobody would be left out of knowledge pursuit.
LA Unified School Disctrict have voiced their concern of the 2013 iPad project as reported in LA Times.
Its a lot of money that went into their education system. Would you have proposed Moodle combined with content providers to deliver contents for Apple?
See http://www.latimes.com/local/lanow/la-me-ln-ipad-curriculum-refund-20150415-story.html