Personally i'd lump dvds with rentals and that would move box office out of the top three.  In 5 years, with the totals of all the 3D releases, the videogame category should still out perform everything but toys.  Videogame could outperform toys in the long run, as with a 3D printer any videogame character could be printed out without the help of Hasbro/Kenner.