I think the most interesting new adaptations of technology are the ones that make clever combinations of the real and digital world. You might say the ones that live in symbiosis, where the digital world feeds on the physical world and vice versa.
Second Life I do not like since it merely involves the digital realm. Meeting somebody from a discussion group in real life creates great physical meetings and makes the discussion later on more interesting, knowing the other person also in real life.
At the moment I am talking to an organisation involved in the safety sector. Practice for them is extremely important. Problem for them is that practice in real life is difficult and expensive. Not all situations can be created in real life (too costly or physically so destructive that it can not be done). On the other hand practice in the digital world does not feel real. It is hard to substitute loud noise, a roaring fire and wind and many people putting pressure on you. In a game you also can get the adrenaline working but different …
The idea of the project is to set up an environment where digital and physical practice is completely intertwined. A group of policeman can be training in a special trainings village while their physical coordinates are transferred to a simulation environment. The commander can than command the real people who are training as well as digital troops. These two world you might say feed on one another, like the fish help the turtle to stay clean buy picking of the algae and getting a good meal by doing it.