The ballroom scene is also one of the first. If you're actually paying attention, ALL of their following films have used computers, progressively more extensively; they're just getting better and better at hiding the seams. They're mostly using computers to give the animation camera the same freedom of movement in its virtual space that a real movie camera has in its space. Look at the camera work in 'Tarzan' and 'Atlantis' in particular for this. For earlier examples, look at the crowd scene in 'Hunchback,' or even some of the scenes in 'The Lion King': as Simba and Mufasa talk on Pride Rock during an early scene and the camera pans around them in an arc. That's a classic 'dolly' tracking shot, common to live action--and without computer assistance it would have been incredibly painful.
The ballroom scene is also one of the first. If you're actually paying attention, ALL of their following films have used computers, progressively more extensively; they're just getting better and better at hiding the seams. They're mostly using computers to give the animation camera the same freedom of movement in its virtual space that a real movie camera has in its space. Look at the camera work in 'Tarzan' and 'Atlantis' in particular for this. For earlier examples, look at the crowd scene in 'Hunchback,' or even some of the scenes in 'The Lion King': as Simba and Mufasa talk on Pride Rock during an early scene and the camera pans around them in an arc. That's a classic 'dolly' tracking shot, common to live action--and without computer assistance it would have been incredibly painful.