It's all really in the eye of the beholder, so to speak. Lucasfilm is now simply choosing to pretend that everything pre-2014 (Minus the things Digifluid mentioned) never existed as they continue to write and produce for Star Wars. But they are going to try to make everything fit together perfectly like a jigsaw puzzle. But the way they've done things is that you really don't need to read any of the books or play any of the games or watch any of the cartoons to understand and enjoy any of the movies. However, there's tons of connections that add on to the experience of the movies if you do play, read, or watch all of that other stuff. The other stuff is like extra credit, but the real meat and potatoes will always be in the films.