ya I've noticed this as well, when u look at sales outside of USA, Wii U & 3DS aren't doing too bad compared to GC & GBA but in USA they are both doing comparatively horrible.
I think a major part of the decline is from losing kids/families to smart phones/tablets. in Wii U's case I also believe price could be a large factor. its still $299 whereas GC just hit the $99 mark at this time.
hopefully for Nintendo's sake Amiibo can be a huge hit among kids along with a potential $199 price tag next year for Wii U and I'm guessing they hope New 3DS has a GBA SP or DS Lite style affect. If all this happens maybe they can regain some ground in USA but that's a big if.
When the herd loses its way, the shepard must kill the bull that leads them astray.







