For Apple's iPad and its tablet rivals, there are three major markets: Education, Enterprise and Consumers on the couch (or in the plane, or on a train, et cetera). It's easy to forget those first two, but they undoubtedly are the largest market opportunities for the tech company. I'll save the enterprise for another post, but let's talk about the education market for a moment. First, the news: Apple announced this afternoon its fourth-generation iPad, touting improved graphics and computing performance, a high-definition front camera and the same 10-hour battery life and price ($499). Read the full story at ZDNet.