It's hard to predict what the "disrupting feature" is because, well, it wouldn't be disruptive if we expected it.
So IMHO...User-based content creation. And I mean, real content creation.
Take a look at the internet. At first, people were willing to receive websites. There were a few webportals here and there that people would visit. Then there were too many webportals and users needed a way to search and filter what they wanted. Hence, Google became king.
Finally, people wanted to make their own webpages. Yes, HTML existed for a while but it wasn't really until blogs sprang up that people found it easy enough to make webpages. So Facebook, orkut, (um...Star something in Europe, sorry I'm American) rule the roost.
I feel videogames could go in this direction if they could make easy game creation. Right now, there are so many games on the market. Maybe too many. We need a way to search and filter games selections so we don't rely on name brand (like webportals) to make a good purchase.
Everyone wants to make a game. But most people don't want to learn code, development tools, and software engineering. The next big step, the next big leap, is to let people modify any game and do it in an easy way. And to INVITE people to modify.
If someone pulls this off, the current gaming companies would have to release their Intellectual Property. And they'd lose "ownership" of their games. For many this is too big a cost, and they wouldn't follow even if the "make your own games" system truly took off.
There is no such thing as a console war. This is the first step to game design.
