Well, the only issue here is Nintendo sort of announced they were working on their next console over a year and a half ago; it'll be 2 years in March. It may not have been revealed, but it'll have been a huge length of time between their initial statements about it and it's eventual release. I think this to some degree has skewed the numbers, as the NX has been in the public eye for a very extended period, even if not officially.
I also don't think Nintendo's shareholders will be too happy if they put off a release any longer. The Wii U has tanked, and while the 3DS is doing alright, it's clear from this year's drought that development efforts have moved on to the NX. Nintendo can't upturn their revenue again till the NX is released, so you can bet the pressure is on to make that happen.
I also don't think it will hurt for Nintendo to reveal closer to the release date than usual. The general public likes to jump on new tech when the hype is high these days, and you spend less on marketing over a shorter period. Perhaps they're hoping they can do a more condensed marketing push closer to the release date? Maybe they're feeling extremely confident about it? Or maybe they're just doing what they have to do under tough circumstances. No one knows but Nintendo!







