In general, there are three kinds of 3-D movies. First, there’s “Avatar,” which is in its own class. Then, there are the many movies that have come out in recent years that have tried to jump on the 3-D bandwagon. These are mostly sequels to sequels, which by definition need something to distinguish them: “Step Up 3-D,” “Jackass 3-D,” “Saw 3-D,” the list goes on.

These days it’s difficult to go to theaters and watch an animated motion picture that is not in 3-D. With “Up” deservedly garnering an award for Best Animated Feature and a symbolic nomination for best picture, it’s likely that theaters will be swamped with animations intricately made with computer graphics in the future.