First thing I have to say is that graphics alone dont make a game good so if a game does not look as good as the cg trailer that not necessarily a bad thing. Another thing is that cg trailers can be used very effectively to tell a story and introduces a game. Take the evil within 2's trailer that just came out. It gives a sense of the tone of the game and it shows off some of the cool weird shit while at the same time giving us story. I personally like when they have cg trailers and game play trailers revealed at the same time, again like the evil within 2. I think that if you think that a game will look as good as the cg trailer you are fooling yourself, because it is also on the gamer to do some research and see if the game is for them. just buying something blindly is not a good idea.