On the first part was that not what I said?I disagree, the people who buy games are just as fickle as the people who buy movies or music. It's the entertainment industry....in terms of investment an AAA game has nothing on a AAA Movie
As for the other
http://metro.co.uk/2013/09/09/gta-5-is-biggest-budget-video-game-ever-at-265-million-3955201/
GTA5 -- 265 Million USD
http://www.the-numbers.com/movie/Hobbit-The-Desolation-of-Smaug-The#tab=summary
Last Hobbit film -- 250 Million USD
Now we can probably debate the relative spread of budgets, though I should mention the likes of the Red cameras have done all sorts of good things in the 100K budget film range.