Yeah, that's what I meant by the total hollywood economic value. Google makes money from multiple services and products too, and in the context of new companies coming in and taking a slice of the pie it makes sense to look at hollywood as a whole. Content (TV, Movies, whatever) and Merchandise (Parks, toys etc) got hand in hand. You can buy angry birds plush toys because once any company establishes a brand they are going to find multiple avenues to exploit it, and any companies coming into the market will be in that position too.
Edit: And you're right Google is a 'better business' than making movies most likely. But that doesn't mean it's not of interest to VC. After all, oil is clearly a 'better business' than Google!