3D theaters are back, baby. Estimates put the current installation base around 1,500 but some chap, Jeffery Katzenberg, predicts that there will be 2,500 by April in time for DreamWorks Animation’s Monsters vs Aliens. The Dreamworks CEO is certain that consumers will spend an extra $5 to don cheap, plastic glasses to experience the movie in 3D and he might be right. 3D movies bring a bit of excitement back to the silver screen and besides, $5 is what you pay for a large soda in movie theaters. It’s money better spent on a 3D experience.