Fighting with my thoughts

I always thought technology was a good thing and I still do but with that being said I find myself over the past week fighting with this thought. I can watch tv, use this computer, call my family and friend and technology also helps the sick but my son was playing his gameboy before school this morning and I tell him to put it away, he had time, he was already for school just waiting for the bus. Should I have let him continue to play it or not, is this taking away from his learning and creativity. How is a parent to know what is too much, kids don't come with guide books, Oh how I wish, so I continue my fight and continue to irritate my son.