Sony sure isn't healthy right now. I have no idea what Nintendo is doing. I guess we have the 720 to look forward to, but they restrict more then they embrace. And seemingly try to force me to like what they want me to like instead of supplying me with things I like.
Perhaps as gamers mature they realize the computers are running better then ever, easier to manage and find a better experience there as it synergizes well with all their other social pc needs (and mobile). Or perhaps they found themselves a girlfriend.