...I thought it already was animated.
If you're actually asking: "Is South Park becoming animated with computers instead of real-life construction paper? Or is it being done in computers already?" Yes. In fact, it's been done in computers since episode 2. The pilot episode was the only one to be made with construction paper, and even then, small parts of it were still done with computers.
If you're actually asking: "Is South Park going to go to a more traditional style of animation, like Disney/ext?" No way; such a thing has not ever been even remotely hinted at.