Its going to pretty obvious that you are doing that though since webcams face back toward you and not away. Not to mention that you would have to be real close to get anything - problem is the front rows are filled with Apple Employees. Not even with wifi would you get anything worth loading in real time - there is going to be a delay. Plus there are the power concerns (as minimal as they are The live updates are much faster.
Second, I would be willing to bet that part of geting a ticket requires that you agree not to shoot video...