I think it will have more to do with motion and performance capture. They have been using motion capture for years to get more natural looking movements. They have expanded performance capture, and I think it has more room to grow.
One of the last games used something like they used in Cameron's Avatar, front mounted face gear capture and cameras.. It would replace the work of many animators, and make a higher quality more natural game.
LA Noir had a version of this, but they did performance and audio separately. I think newer ones will just get better.
And if you really think about it. Avatar was made on tech around 5 years old! That's a few Moore's Law cycles.







