A high-end rendering technique that was previously only availble on workstations (and even then very slowly!) is coming to your phones
It's really, really hard to create a GGI human face that's convincing. If you know this, then you also know the reason why so many blockbuster movies (Antz, Bug's life, Cars, WALL•E etc) have been about things and not humans
3D video - not just stereoscopic video but moving images that you can literally walk around - will need a different kind of camera.
Fur. It's hard to model in CGI. For a start, it's not one object but hundreds or thousands or millions of them. To make them convincing you have to model them; understanding how they move relative to each other, and to the animal or human that they're attached to