'Disruption' is just a way to describe a strategy which is focused on something that the conventional wisdom within the market would say is unimportant, but in reality is very important. In a lot of ways you could say that the rise of the Japaneese car was because Japaneese automobile manufacturers used a disruptive startegy in the american auto market; in the 1970s they focused on fuel ecconomy while American car manufacturers produced muscle cars which gave them an edge after the OPEC oil crysis (where American car manufacturers were forced to play catch-up).
In the short term future (essentially this generation) I don't believe it is possible for someone to disrupt the market in a way that gives them an advantage because the effects of Nintendo's disruption are still being felt. In the comming generation it is quite possible that someone could implement a strategy which disrupts the market and takes marketshare away from Nintendo. Now the question is 'what could that be?'
One future I see happening is what I call an "online platform" where the borders between one game and another become blured. Imagine a MMO game where everything you can imagine is possible, a true sandbox game with (virtually) unlimited possibilities.
