Games are definitely a spread phenomena across the world, where "big" names like Max Payne, Diablo, GTA, etc, are enjoyed by millions and millions of gamers, featuring complex plots, full-fledged characters, eyecandy interfaces, etc.
Nevertheless, along with complex games, it seems that simplistic games are still played, maintained and developed, simplicity that can be used for various purposes, such as procrastination, short breaks between various projects, mind relaxation, etc.