Ian's point  - about social scientists being worried about people who played video games in 1980 still enjoying video games in 2003 (do fans of baseball or hockey cause them such fear?) - reminds me of all those folk who wonder where the Spanish speakers came from in SW USA, forgetting that when you annex a chunk of a country it comes with people included.  People stick around and pretty much do what they did when they first started doing it.  I suppose this means my kids will be moaning "oh, no not The Clash again, Dad" from the back seat when they hit their teen years. There is hope, however, as one is already playing Asteroids.