They announce shipped numbers literally every 3 months in their financial reports

Don't forget GTA6.  This will come near the end of the gen and sales of ps4 that holiday will be insane.  Vast majority of gta copies will be sold on ps4 and by then the base version will probably cost $199 if not $149. 

I didnt put GTA6 in because of RDR isn't even out yet and i expect GTA6 to be at least 2/3 years after that. Considering that on the PS4 Rockstar has sold 12M+ of their remastered GTA5 game we can understand why they are in no hurry to release any new games. 

But yh, we aren't even in the best of the PS4 years yet. I expect next year to be the last year we see any major sales movement due to price, as next year the PS4 will probably be as low as $180-$199 around the holiday period. With the PS4pro at $299. After that point we won't see any significant price drops anymore, just the odd $20 here or there. 

The next major hardware push will be when RDR2/GTA6 comes along. And things like GTs/GT7/GOW.

I honestky can't believe some people think the PS4 isn't going to hit 100M.

And some feel the scorpio will make some sort of difference. it wouldn't. not in the slightest. But that's another story. 

Lol NO.

1) Xbox one at 25 millionsish. 22 millions sales for end of september 2016.

Vgchartz is probably really close to reality for Xbox one numbers.

2/3) I don't think so. we need to wait Npd tho.

 I feel like native 4K is going to be the standard resolution for PS5, in the same that 1080p was for PS4. Performance-wise, we'll probably see 60 FPS with upscaled 4K for games like Battlefield, and then 4K/ 60 FPS for multiplayer. I sincerely doubt that Sony is going to try to kickstart the 4K age on consoles, and not try to make it a standard on their next console iteration. PS5 will be very interesting. 

 It sold over 2 million units during Black Friday week, alone, and we still never got the solid figures from Cyber Monday; just that A LOT of hardware was moved and that PS4 was the best seller. 4.2 million in 5 weeks is very likely, as incredible as it sounds. 

 That means 20 million for the year. If I'm not mistaken, didn't Sony say they were anticipating 14.5 million sales? If so, then they exceeded their mark by a huge margin. 

On top of that, if I'm not wrong, this year wasnt even PS4's peak year. Once games like GT Sport, God of War, and Spider-Man hit the market, as well as a price drop to $250, PS4 is easily going to push 25 million units in 2017. That's just insane. 

Yee it will, and the PS4pro and the upscoming scorpio is definately going to prolong this gen. 4.2TF or 6TF is not enough for native 4k across eveeything. At least not on oar with what native 4k will look like on PCs. 

With a 7nm chipset however, we can see anywhere between 10-12TF GPUs in consoles. So as I keep saying, when you start hearing talks of 7nm chips, then know the next generation if consoles are just around the corner. 

As funny as it may sound, even with a 10/12TF GPU, I don't think Sony will chase or try and force native 4k. I think they will improve the checkerboard hardware they have in their current PS4pro GPU and insist all devs go for 2160p checkerboard. Channelling all that extra power into other aspects of the games IQ. It's a smarter use of power. 

Someone really needs to analyze what Sony has done and you better be sure Microsoft will be doing so.
Scorpio is coming next holiday. Thats fine. But holidays are the about saving money. Thats why the Slim went berserk and beat the Pro (and all Xbox SKUs) in 2 days. So next holiday, within the Xbox ecosystem, the biggest driver will be the Xbox One S.

Looking at 56m+ shipped by the end of the year.