It says 'poll' in the title, but there is no poll?

Somewhere between the Wii U and 3DS I think. The 3DS is still going and the handheld market is shrinking every gen. If I had to throw out a number I would say 45 million

3DS never had framedrops. But the Switch from the beginning.

The 3DS have other clientel than the switch. The 360 was never build for 6 to 15 yo childs. but the 3DS.

40-45 millions. Bookmarking this thread to read again in the next few years!:P

Just because somethings available doesn't mean  it will be used, Nintendo isn't known for using the latest tech ,example they could have used the X2  anyway even when they do new iterations it  has been handheld and tends to revolve around upgrading the existing tech and enlarging the screens rather than switching to new chipsets.

If 3rd parties support it and they do multiple upgrades like the PS4 and PS4 Pro, over 100 mil easy.

Worst case senario I see it doing 3DS numbers as it SHOULD have a combined library of Nintendo's console and handheld caliber games. More software equals more reasons to buy afterall.

If none of this happens and Nintendo for some reason makes a 3DS successor, Switch will likely flop however.

All in all, I think it is most likely that Nintendo and the Switch have a bright future ahead of it. They are in a good position to make this a hit and will have to really mess up for it to flat out fail. Still, there are a lot of factors that we still do not know so we will have to wait and see how it plays out.

extremely difficult to predict at this moment, I would just say 50 to  60 million without any conviction at all, it has the potential to sell more than that though.

If they were aiming to launch in late 2016, which I think was their aim (they just missed it because of software, not hardware), then no a Tegra X2 would not have been possible.

All I'm saying is who's to say Nintendo will follow the same hardware upgrade path as the past? Switch already breaks several rules and now that there is no seperate Nintendo hardware lines, perhaps more Ninendo hardware can co-exist. This is something Iwata said with a unified software ecosystem they could have *more* hardware (just playing the same software). 

Just like a Macbook ... there are tons of different models of Macbooks and more powerful ones come out every 12-18 months. Doesn't mean the older Macbooks are suddenly obsolete. Some people only need a Macbook or regular Macbook. Some people want a Macbook Pro. 

I'm just giving an example perhaps the Switch will become an ecosystem more like that where different people can have different needs met with different models that are at different performance and price points. 

Hell, really we're already seeing this with Sony and MS, but I think it suits the Switch better and Nintendo was talking about ecosystem of devices before either one of them. I think "ecosystem" versus really what is a singular hardware with just more minor-ish varianations is a difference you could see change with the Switch. 

And this is different even from what the 3DS is, the 3DS is more or less the same hardware just repackaged a few different ways more or less. That's not a "real" ecosystem of devices IMO. Switch, however, could be. 

Nothing less than 120 million will justify the decision to merge handheld and home console form factors.

(1) True for me, and I think at least half of the WiiU-owners also had a 3DS.

(2) True for me and as I see it I'm not alone.

(3) Hmm. Currently I don't see me buy another Switch. BUT, with the 3DS it was different models which brought me to buy it. If there is a model in say two years, which offers more value in my eyes I might pick up another one.

(4) I was more conservative with my 50M predition, but frankly this is the lower bound, I don't think Switch will sell below this. If it get's hot for some reason (games, add-ons, whatever) it might sell a lot more.

If it can beat the PS4 is a difficult question. At this point I say no, but as I said with (4), many can change. At the moment Switch has the basics right and initial momentum. Now is it up to Nintendo to keep and even increase this momentum.