Other than the Wii everything has been in decline since the Famicom.
Yes, and? Still has no real reason to tank, especially since it sounds like they are connecting it to their handhelds, which always have sold incredibly well. The system doesn't need to top the charts, it just needs to do well for them, whatever that might be.
And?" It's pretty self explanatory what that means, the NX is desperation in itself to remedy a much deeper problem which isn't just unique to nintendo but most most evident in them out of the three gaints right now. Even the handhelds are in rapid decline across the board, the Pokemon brand is the only big sellers on the handhelds. I'm pretty confident the market is going to collapse soon but not sure when, but more advanced virtual reality will bring it back from the ashes again just not yet. The first wave of VR will make it a more accepted household brand, and the sony VR will be dominant at it's affordable price and large consumer base. But it wont hit it's greatness just yet as i said. In the future it will, this first wave will look like the industry did between Atari very early 8 Bit gen did. The very nature of the industry is showing serious signs of collapse from within. More people now are gaming more than ever before, and its on the rise.. sure, but it's outwards appearance. A massive rise follows massive decline soon after, that's what follows just before collapse. The final golden years/Peak of "console" gaming and the turning point into eventual decline would be the years between 2008-2009. I would say it's been slowly declining since those days. But it's starting to be made more evident/felt these past few years.
You'll have to wait and see, but a victory like the Wii had in 06 the battle lines will never be the same again like that, and i'm pretty confident the NX will be a failure, as for the upgraded PS4.5 it'll be moderately successful and hold things over until the next generation when things will begin to get interesting again finally. We're in massive transition right now from the old to new.