The world of computing can be very addicitive. I should know, as a IT professional i spend a minimum of 10 hours on computers. However, wherever i go i am worried about youngsters doing the same. I have been recently reading an article on BBC - "Are we raising a generation of 'young loners'?", that addresses this question.
My personal opinion? Well, all said and done - computers are here to stay. But for children personal growth is important! They need to go out there, play, fall down get scratched and learn the rules of real life first. Because the computer screens gonna have to be switched of sometime or the other - what happens then? One day, you eyes will be too old to see the computer screen - what happens then? Everything in life has to be done in a balance - i have no issues about kids playing computer games, but reading real books and seeing the sunlight outside the house is equally important !