How many NX's does Nintendo need to sell for it to be considered a success?

[Alby_da_Wolf]

RolStoppable said:

Alby_da_Wolf said:

OK, combined owners is a little less difficult goal than combined previous gen device numbers, and it's reasonable to expect that a decent improvement from Wii U sales should more than make up for portable sales decline, so yes, I agree on this. Financially the goal could most probably be much lower, but if Ninty wants to stay relevant in gaming it must aim for more.

No, I didn't mean to make an adjustment to my previous numbers. You misunderstood.

I don't care about a breakdown of unique Wii U and 3DS owners. It doesn't matter. The minimum goal has to be to sell more hardware units than with the Wii U and 3DS, because fully expecting further decline is pretty much the equivalent of giving up.

Oh. But you cannot expect people that bought a Wii U and a 3DS to buy two NWs each, and while home consoles sales  can and must be bettered a lot compared to Wii U, a decline in portables doesn't look avoidable, unless it turn out that 3DS too performed a lot lower than its full potential.
But wait, if NX will be a portable with an optional docking station providing more GPU power and connections for home use, will you consider portable NX plus docking station as two HW units? If yes, I can agree on your numbers again.