As I've already mentioned, the media do bleed over quite a bit. Video game movies have been coming out with increasing frequency since the early 90s, and they've become increasingly successful (although the movies aren't, as a whole, increasing in quality). I think this disparity you've created is in large part an illusion. Video games are even starting to cross over with the music industry to an extent. Take a look at Grand Theft Auto, which has been using popular music on the radio stations for a while now. Hell, look at Final Fantasy XIII featuring Leona Lewis for the theme song. As for television? There's an entire channel devoted to the video game demographic. What more do you want?
WHAT?!?! Leona Lewis sings the theme song for Final Fantasy XIII?! Is that really true?!