Game Genres On a Merging Diet

If you are to ask a teenager about video games today, and more specifically, what genre does s/he play, you will more than likely get one of 3 answers: FPS (Halo, Call of Duty: Modern Warfare), RPG (Final Fantasy, Dragon Quest), or Action/Adventure (God of War, Uncharted)... What happened to all the other genres that used to dominate the industry?

Perhaps you recall some old PC games that went