I dont play Gran Turismo, too boring like Forza. However MAG was a terrible game and the ONLY good game for PS3 was Metal Gear Solid4.
The PS3 does the media center well but thats about it, gaming on that console makes me feel like I have some cheap thing in my hand I bought from the dollar store.
And billions care about Halo since it has spawned millions of other peices of media from books to movies and apparel