Siggraph has produced a trailer highlighting some of the new and exciting experimental stuff that will be presented at the show
Good CGI is so realistic that you don't always know when you're looking at it. So, Ironically, CGI artists take it as a compliment when their work goes unnoticed.
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
3D video - not just stereoscopic video but moving images that you can literally walk around - will need a different kind of camera.