I LOL alongside Dirk on this. Wii/DS are on the 10-year plan to pancake this industry into submission. 3rd parties, prepare your bankruptcy statements.
I think 10 years is freakishly optimistic. The Wii was realistically behind the times with it's no-HD support when it came out. In 2016 you think a console that doesn't support HDTV features is not going to seem ridiculously out of date?
Nintendo is not without competition. Sony and MS are introducing their own motion control options. Now I find them to be pretty laughable but things aren't final yet. Sony and MS likely will release another console in that time where they will have a clear edge in hardware (though if they're smart it will be a more conservative and less expensive one) and they'll have motion control, which will likely be more refined because they'll have learned from their first attempt with their current consoles. Nintendo will no longer have any unique feature to hold over the competition.
Now maybe Nintendo will combat that. Maybe the competition will **** it all up. But for Nintendo to not at least prepare for this would be idiotic. So I think it's pretty damn obvious that Nintendo is working on the next gen. Maybe they don't need it yet but if they have even the simplest business logic they're not risking that. They're well aware of how competitive the console market is and can't risk having the competition get a hit with their next console and then be stuck with an outdated machine on the market while they scramble to get a new product out the door on short notice. They cannot assume everything will go 100% the way they want it, particularly when a 10-year lifespan would go against any previous console market trends.