Bitrate today will not be able to compete with the bitrate and graphics capabilities of tomorrow. Yet, today, a number of movies produced use virtual humans to represent principal characters. These movies utilize VFX artists to accomplish complex movements and facial expressions to build over wire structures and make these computer-generated characters quite believable. This was depicted in The Incredibles where the superheroes were heavily animated and styled. A rather much more different motion caption-based approach was used in The Polar Express to create the nearly realistic human or the Kia Stinger Super Bowl commercial with Aerosmith lead singer Steven Tyler.
It is not an easy feat to create realistic animated human beings due to the complex nature of the human muscle and skeletal system. This is why animators rely on the use of motion capture and even that has not been perfect. In the nearest future, through deep learning, A.I. and lessons learned from motion caption sessions with the current set of animating tools, animators will be able to create realistic virtual humans efficiently, from scratch.