Barriers are about feasibility to get into the market. but there are 3 things that are of note in this situation 1. Its very easy for a firm to create a console, its just the os really (a high barrier would be something requiring a billion dollar investment or something) lets remove sony and nintendo from the picture, lets say wiped out for whatever reason. The barriers to create a console are so low that any small firm could build one, look at steam box, oya ect. 2. While monopoly's may exists, the government will only step in if the cost of products/services rendered outweigh the net social benefits they produce. And gaming dosent really produce a major social benefit, while Phone service does "att forced to split" 3. that's tricky. if they are charging a exorbitant amount of money to use there proprietary and hard to compete with (see point 1) hardware yes, id say that it might be something to look into legally, Microsoft got nailed for this once. But if its something like a proprietary thing like motion control, Im not sure. Thing is with this kind of law is that its a lot of research and arguing. And while I do have no problem covering the surface. I dont care to spend hours on end for a forum discussion right now. "no offense" I did hope I covered some of the big ideas though