Every generation has the kids who follow the trends no matter how stupid and those who do their on thing. MTV might play to the easily amused masses, but I dont think everybody follows it relgiuosly.
There are kids who love any FPS that comes out while others like maybe a few but play other types of games.
As stated before, when the games get to be too much crap people will start doing something different and the market will have problems like atari did in the 80's. While the market feeds off of lemmings, there is a limit to what is acceptable even for a lemming.