1 I see the same consoles with new perepherials.
2 Yes
3 Yes, because a perepherial isn't anywhere as good as a pack-in to the casual user. THe wii would have a massive amount of games that used the motion controls right by the time games for these controllers start to come, and we are already half way through the generation. Even if it did compete, they must have a game similar to wii sports, which in my opinion is the definition of a console seller, other games that utilize these motion controls good, and games that target every demographic. So no they can't win the against the wii, because by that time the wii has a larger advantages, and already will have so many consoles on the market it would be near impossible.
Next generation if all nintendo is doing is upgrading the wiimote, I have no doubt the console will be on par with the others. Maybe even more powerful, because the competition has to build up their wiimotes, and have far less money to spend on gaming. Nintendo's console will be cheaper too no matter how powerful it is. This is because MS and Sony take the multimedia route which has additional costs, while nintendo makes only a game console and nothing else. Nintendo will also have brand name to back them up, and while brand name doesn't determine who wins it sure helps. Also 3rd parties won't underestimate nintendo next gen as they did this one. They will support the next console from the start, and I could even see it getting more support than the other two. Anyway this is all speculation and we should wait until after E3 to see what MS and Sony have been doing with their controls.







