I used to love video games, but the older I get the less and less I like them. Case in point is Halo 2. My roomate went to Kaneohe and waited in line for forty five minutes to get a special collectors edition that came with a dvd that chronicles the making of the game, and various things related to Halo. I really like video games, not so much for the gameplay, but for the stories.
Metroid,The legend of Zelda, Metal Gear Solid I and II, and Final Fantasy along with countless other games are fun for me because of their stories. If these were all made into movies, I would throw down the bones to see them. But really, the gameplay kind of gets in the way for me. Honestly, if someone would play the game and advance the story, and then let me sit in to watch, I would be fine. Why did I stay up until 4:30 on a Saturday morning playing Metal Gear? The further that I got, the better the story became.
Mindless shooting is not my cup of tea. There has to be a reason behind it. I played Doom for about two weeks before I put it down and never picked it up again. There was no story, just shooting, and that can only carry a game so far. Betrayal at Krondor is another Great game that I would play, even today, because of the rich story, and sub-plots that add to the gameplay and make it all worth it.
In short, why these be movies. The cinematic sequences in these games are almost animated movie quality. Why expend the effort to turn them into great movies? You could make money on both ends. Sell the game and the movie at the same time and make a bundle? But that probably will not happen.
Until then, keep on gaming