Film I'll make this brief because there really isn't much to the idea. In recent years there's been much annoyance that the likes of Andy Serkis and Andy Serkis haven't been nominated for acting awards despite their motion captured performance being an important part of the process in creating a computer generated character like Gollum or Kong. Extraordinary pieces of magic like Paddington (which I saw last night and led to this brainwave) lumped into the general special effects categories when the work on them is clearly of a different order to throwing a car at a motorway or what have you.
Last night it occurred to me that what could happen is that the characters themselves are nominated. In other words, the Oscar would go to Gollum or Paddington or Groot as the result of a collaboration and the collaborators who worked on the character as a group would win the award, the voice/actors, designers and animators with the name of the character as the representative element of the achievement (the members of that group decided upon by the production as part of the nomination process perhaps with the director/producers deciding which element they're most proud of).
To separate it from straight animated characters, it would be called something like "Best Animated Character Within a Live Action Context" or something snappier. So that different achievements can be represented, you'd also perhaps only allow one character per film, which would make things tricky for Guardians of the Galaxy. Also you'd have to limit it to characters who're predominantly CG. Stuff like cartoon Legolas wouldn't count.
All of this would reduce the discussions about how much of an actor's performance is enhanced by animators, how much of it is truly just about creating a fully computer generated make-up or simply copying a performance. As to who would actually get the award? A raffle? Or would it go to the animation studio? Dunno. Actually this still means Andy Serkis wouldn't end up with an award doesn't it? Oh hum.