I feel really bad for Nintendo. What can they do? I predicted it when it was announced that they will have this issue. The only thing they can do is be Nintendo. Hit high, hit it big. Mario Kart, Zelda, Metroid, Smash Bros. All of them, creative and fun.
Doubt they will have a better online presence than Sony, seems that online is a huge focus compared to PS3. Also 3rd parties all over the fucking place. Bungie doing exclusive content is big too, I like the concept of their upcoming game (if its good, that is another story).
I agree, a high end PC will cost thousands. Then 3 years later games might not be as optimized for it, while the PS4 will have all games running optimized for it. I think the Steambox, if true, has a lot of work ahead of it.
You say that Nintendo will work more with magical experiences? Where are these experiences? I think Sony had better games at this E3 than the Wii U had all year and at their E3 event.