It depends on the kind of use, I think there is always a balance to be found. Get fresh air, enjoy traditional pasttimes but if your child is using technology in a constructive way then I don't think preventing them from doing so is a good idea.
I am dyslexic and learning computers at age 10 is what helped me survive in high school and go on to a good career. If I was left with pens, pencils & grass I would have been ******! :D
I strongly agree with you