The problem here is when it will be replaced.

- Some may think that it is not strong enough to be rided until 2018/2019, but honestly, it is not like it will receive less third party support. Since it is already a Indie/Nintendo machine, maybe it can keep being that for more time.

- Swapping it too early can affect the nintendo core fans, this is very dangerous, since Nintendo needs them more than ever

- If Nintendo put another console early, even if it is stronger than the PS$/XOne, it wouldn't have the user base. It would still be left alone by the third's.

- 2016 would be too early for a 4k supporting machine, for a small price, and too late for a 1080HD one.

My conclusion:
If nintendo is going for cheap HW, 2016 can happen.
If Nintendo is going for the benchmarking tech, they need aligned launchs with PS5/Xbox One 2. They would still need better online, marketing and, somehow, better third party support .

With many people over the summer predicting wii u to outsell ps4 that could be big trouble for ps4 sales.

Well it's trailing the GameCube, thus so far beating 21Mil would be a surprise.

It wont cross 15 million mark at this rate.

well it's already  tracking worse than GC, and yes it's possible that WiiU become the worst console (in sales) in Nintendo history

I've said 18-25 million for some time now and I'm sticking to that.

Doesn't matter, as long as we keep getting amazing games I am Happy! ;)

Low projection 15 mil
High projection 20 mil.

That's based on the current data and the assumption that Wii U had its peak year this year and will release a successor in 2016.

I don't think anyone has ever said that...

*cough* Virtualboy *cough*