I also wonder what Sony will do next gen because I think things will be a lot more different next gen than what we're used to. It's not like we'll be getting 3 consoles that are almost the same like every generations had. This time, the 3 consoles might take different directions. The only one we don't know much about is the PS4.
We know MS will release the next Xbox with a better version of Kinect and because it "should" come out with every consoles every games will build around the new Kinect, just like they did with XBox Live. We also know about Windows 8 that's supposed to bring more life to PC gaming, the new Windows for tablets and phones we'll see how they implement everything together. I don't think we need to worry much for MS, unless we still care for Japan.
On Sony's side... I don't know. No new medium technology needs to be adopted except for onlive gaming but we all know that's not what they want right away.
Motion gaming is already out and full body tracking is already adopted through Kinect.
Making it super powerful? Why? So it is too difficult to develop for again? And costs a lot too? Next gen we'll see even more game engines being reused that what happened this gen with UE3. Graphics are not what sells games, next gen will see not only impressive graphics but we'll come to a point where it'll start to be beautiful enough so people will not care anymore (it has already started)... I'm not talking about fanboys on forums.
I really have no Idea.
