From reading the other comments a bit, let me mention one thing:

The lack of 3rd party blockbusters is not.....no, no, that won't do....CUT! Let me try this again.....

The lack of 3rd party blockbusters was [ahem] ------NOT------ what killed the WiiU!!!! (....there we go)....

Instead, the lack of 3rd party blockbusters on the WiiU simply meant there wasn't that protective insulating layer to offset the comparatively sparse 1st and 2nd party support paired with a [theoretically potentially awesome but] miserably developer supported, and largely fan unloved albatross of a "special use case" (the tablet) which could never be decoupled from the system and preventing those things from doing the job instead.

The WiiU was a failure. Well, let's be honest, failure-ish - it was only a failure in a relative sense. It was actually a smash hit compared to the Atari Jaguar, Philips CD-i, Apple Bandai Pippin, and so many others. The original Wii, by comparison was a soaring success by all measures. So what was different and similar about the huge success of the Wii and the huge disappointment of the WiiU?

Was it 3rd party support? [BUZZER!]

No, both were very disappointing in terms of major 3rd party support (and both were actually pretty solid in terms of minor-tier 3rd party and indie support.)

So what was it then that set the two apart? Well, there were a thousand little things, sure.....but there were at least two super major things:

1) 1st and 2nd party software support. Volume, frequency, novelty, originality (vs upgraded re-releases, and whatnot), a cogent and robust Indie space and let's not forget - virtual console in the respective stores, useful, well-received "channels" and so on.

2) both offered innovative, unique, and at the time, completely revolutionary interface (use case) design propositions. But the difference was that the one the Wii offered was amazingly well received quite broadly and was widely believed to be refreshing and paradigmatic. Meanwhile, while all the potential was there with the WiiU tab (including a Game Boy Player style TV interface scheme for DS and 3DS games on the big screen), and while it certainly did have a small number of passionate fans and an even smaller number of committed developers, by and large, consumer and developer alike looked at the thing with reactions ranging from "eh" to "what the hell are we supposed to do with this thing?" Then you realize that the addition of the thing jacked up the price of the system, and that you were unbreakably tethered to it with no escape from it, and it's no wonder the success stories of the two systems are so vastly different.

The big 3rd party blockbusters might have provided some level of insulation for the WiiU from its fate. But -AT THE VERY MOST- it was a supremely distant tertiary cause.

So, Nintendo has proven with the Wii and the WiiU two things:

1) Nintendo can float a huge success with very little major 3rd party involvement.

2) Nintendo can sink a relative failure with very little major 3rd party involvement.

So why then are we so fixed on the matter of 3rd parties on the Switch - especially as it bears on the conversations of the system's success or failure proposition? It's like seeing smoke pouring out of a building to the south of you, and sending the fire department to the building to the north of you, and wondering why the fire's not going out. It is the absolute last place we should be looking. Most of us are smart, rational, reasonable people. But smart and simple, rational and irrational alike all become the same one-word descriptor once the fixation on 3rd party starts.....and that word is......[edit: "idiots" is probably way too strong of a term.....but "misdirected" is certainly not. Please take that term as my substitute].

Instead, for our prognostications on the outlook of the Switch, we should be examining the big picture narrative of the Wii, as well as the big picture narrative of the WiiU, and seeing which one looks more familiar to us in the Switch's 2017. Robust or lackluster 1st and 2nd party software support? Widely lauded and desired, or widely panned and undesired innovation in its form-factor / use-case? Which one of these two previous system's stories most closely matches this one's so far?

I certainly believe (and way more than half of both the industry and the commenting laity seem to agree with me) that by these standards we've got another Wii on our hands, rather than another WiiU - and the sales numbers so far seem to also agree. And also, let's make sure we don't forget this is with a March launch, rather than a holiday or pre-holiday launch window, so if the numbers are "artificial" at all, then they are far more likely "artificially low" than the other way around.

Let's be judging by those measures instead, shall we? And if so? OPTIMISM!!!

Now look, I want the major 3rd party blockbusters too! I want Doom, I want COD, and Battlefront and all the rest! And I think the system even in its infancy is already proving that it's at least powerful enough that it could handle such games just with a modest amount of graphic down-tweaking. So I think we have no reason why we couldn't have them, and by extension, SHOULDN'T. I'm quite, QUITE happy with the system as it stands, but I'm with you in that I'd be waaaaaay happier with it WITH them rather than without them, and I also agree that the major offerings have indeed been pretty sparse to date. I'm with you. I want them. Bring em on!......

......BUT......

To the question of do we -----NEEEEEEED----- them? Does the system NEED them? Does the fate of the system automatically hang in the balance on the matter of their presence and absense? A thousand times ten thousands over, the answer is -------------NNNNNNOOOOOOOO!!!!!!!!----------- we DON'T! The Switch will live or die with or without them. And right now, the outlook is not only optimistic, but it is ---INSANELY--- optimistic!

We've got enough "sky is falling" around us in the present climes of this world. How's about we stop making too much of the 3rd party business on the Switch.....and dammit.....just enjoy the blasted thing! If you want Battlefront, there's always XBox, or Sony.....or 1000 times better than either of them.....PC!

We'll have plenty to keep us entertained here on the Nintendo. Many of those things are right here on this infograph!

Cheers!