Odds of Getting In
Computer animation is techno-cool. It's cutting edge, it's artsy, and it's highly competitive. As with most fields that are identified with creativity, innovation, and arty-ness, the number of aspiring computer animators way outpaces demand. So, to increase your chances of employment, have a portfolio of stellar quality, at minimum.
Academic credentials are good but not as important as they would be in other fields—say, nuclear physics. Experience counts big-time, so it's good to have some internships in tow, where you worked for peanuts, or less, from well-respected animators, game designers, and programmers.