Sony is know for selling millions of consoles even after their succesor releases. Especially in poor countries (the reason why they've such a worldwide appeal in parts of the world like Malaysia, Middle East and Eastern Europe is their dirt cheap PS2 imagine the millions of PS4's sold in China if they drop the price to such numbers). And they have Spiderman which is big in Asia apparently.

One thing to note is even if sony pushes ps4 in china, it would mean jack shit of third party devs don't push thier games past the brutal chinese censors, and considering the main games of ps4 are high T to M.... yeah no.

Ninty does not have this issue. Not only does most ninty first party really have nothing to censor, but if they really wanted to they can push it along with big money.

A lot of people saying the PS4 will sell more only are looking at the present and not the future. This is also why a lot of people thought the Switch would fail because, in the present, the Wii U failed. Also, no one is looking at handheld sales. Here are the first 4 fiscal years of the DS

3/31/05: 5.27 (system launched in November)
3/31/06: 11.46
3/31/07: 23.56
3/31/08: 30.31
3/31/09:31.18

The sales are closely mirroring the DS. The only difference was the DS was released in November. In about 16 months (plus 9 days in Nov 04), the system sold 16.73 million. If Nintendo meets their projection, the system will meet that in 12 months (14 + 2.7). This is with only one holiday season. Like the DS, you already have Japanese publishers jumping on including Square, Namco, Marvelous, and maybe Capcom, and a lot of these will be exclusives. And of course, there will be Animal Crossing, 2D Mario and Pokemon.

By all accounts, Switch will sell better.

At least let it be on the market for a year first before you start saying things like that.

To OP, I think whoever wins it will win it by a small margin. 

Easily PS4 ...

If we take a look at their first calendar year of shipments (Which means that we're going so far as to exclude PS4's first quarter!) the Switch already can't match the PS4 with the former expected to ship ~14.5M units at the end of this year while the latter shipped ~15.5M units in it's first full calendar year ...

What's more is Nintendo is only expecting the Switch to be upto par with 3DS in terms of shipments in similar timeframes and especially in a similar period where PS4 arguably had less incentives to be purchased in comparison to the Switch when most of it's AAA games were cross-gen titles where the said games already had abundant access to existing userbases ...

Once Nintendo releases the rest of their flagship franchises such as 2D Mario, Animal Crossing, Pokemon and Smash Bros it will become substantially harder to move hardware ...

I cannot envision a scenario where Switch will be able to have more than 4 strong years of hardware sales without the use of new IPs or the growth of existing IPs like we saw with the DS while in PS4's 5th calendar year in which there's a possibility where it could ship about 85% of what it did this year and the in it's 6th calendar year it could still have a relatively strong showing ...

In spite of the fact that the Switch has had stronger releases than it's predecessor, it is only expected to match it's predecessor first fiscal year in the given similar timeframes, probably still can't match the PS4 in it's first year and then there's a high chance that hardware revisions won't be as plentiful for the Switch in comparison to it's predecessors ...

Nevermind the idea of Switch beating the PS4, it has to first show that it can at least match it!

I'm thinking the PS4 will sell more in the end. It's still selling very well and is getting a lot of support. It'll be hard for the Switch to beat that. Although it's still a little too early to tell how well the Switch will do. It's still lacking a bit of 3rd party support.

@Bolded: Just to state the facts: this applies exactly to PS3 and Wii.

@Underlined: 2019 or 2020 would've been sound realistic, but 2018? Which console ever slowed in it's second year on market? Even a dud like WiiU managed to grow from 2013 with 3.1M to 2014 with 3.6M. Only Vita failed that hard, they had 3.7M in 2012 and sales slowed to 3.2M in 2013. But Vita is here the outlier. Looking at coming releases like Pokemon, Animal Crossing and so on, it seems very unlikely the Switch already slows in 2018. That is wishful thinking on your part.

I think the PS4 will win. The reason is, that I think will burn bright, but will burn out fast. Comparable to the Wii, that was dropping in sales early after it had sold record amounts. I see something similar for the Switch, selling for some time extremely high, but in the end falling short of catching PS4.

The reason why I could be wrong is some new breakout IP. Like Pokemon was for Gameboy, GTA was for PS2 and Monster Hunter was for PSP. Obviously it is unpredictable what will catch on and be a new bestseller and if one platform will profit off it.

What's crazy is Nintendo almost created the "Playstation" back in 1994 before it fell through. Can you imagine the Nintendo Playstation?

There’s some...... questionable logic going on in the earlier posts here lol. But we can always count on Ryng, StarDoor and Rol to bring clarity :)

I think it’s quite possible either way, to be honest. at this point in time, I believe we simply do not know enough to make confident predictions. On one hand the switch could be front loaded (though there’s zero evidence for it, and people said that about PS4 too), on the other, with a sales curve like the DS, it could smash the PS4.