I can relate to this. My boy is around the same age and is just starting to learn to use the computer and interact with learning games. Using the computer with him on good quality educational sites is great fun but it is only a part of the bonding and learning we do. He already has around a hundred books and bedtime wouldn't be complete without reading a selection. He also loves playing with the games on my phone and even with simple things like Arkanoid on the DS - again he can't actually play them which can be frustrating for him at times, but he loves the whole experience of joining in.
Fortunately his curiosity and love of learning aren't confined to sedentary activities, he is just as happy being outside in the woods or playing in the garden and he is extremely social. But he is definitely picking things up from the media around him as well as from us and his nursery school (we live in Sweden and he is at an international English speaking school). Watching the learning process is fascinating!