Cats is the second-long-running Broadway musical and a pop culture phenomenon. In 1998 Cats was turned into a made-for-television film. It was staged like the UK version of the show live, making one feel like they are in the audience. But in 1990, Steven Speilberg was talking to Andrew Llyod-Webber about an animated film of Cats. The project somehow died and now in 2011, there seems to be nothing in development now.
http://articles.latimes.com/1990-06-26/entertainment/ca-713_1_lloyd-webber
http://articles.latimes.com/1990-06-26/entertainment/ca-713_1_lloyd-webber