We know the sales peak when there are some factors in play, like a) discounted hardware b) estabilished library of games c)release of expected titles that appeal to new gamers, if there are more factors please let me know

A, B and C are all here for 2017. And we have also PS4 Pro and X1 Scorpio that are going to bring some re-purchases and some new gamers that wanted 4k machines. For PS4 we also have PS VR gaining traction among developers, so people that want VR experiences but don`t want to spend a lot in PC VR right now might get a PS4.

I think PS4/X1 will peak this year and maintain momentum in 2018 when new price cuts come in play.

I wouldn't be surprised if they both already peaked.

Yes A, B & C are all here this year, but they were also here last year and neither saw any notable growth despite all of those things.

Usually a console's sales peak at year three and then decline. The whole mid generation bump isn't going to change that imo.

Far Cry: Primal-3 million

The Division-7 million

Dark Souls III-2 million

Doom-3 million

Uncharted 4 (PS4)-8 million

Overwatch-4 million

Madden 17-5 million

NBA 2K17-4 million

FIFA 17-13 million

Mafia III-3 million

Battlefield 1-10 million

Skyrim Remastered-3 million

Gears of War 4 (XBO)-3 million

Titanfall 2-2 million

Infinite Warfare-10 million

Dishonored 2-2 million

Watch Dogs 2-4 million

Final Fantasy XV-5 million

Here are the multimillion selling games on PS4/XBO that released last year on top of that they both got revisions, official price cuts along with further price drops over the holidays yet sales were essentially stagnant.

I agree with the xbox. Data so far suggests xbox is doing better year on year 2017 compared with prev years. So entirely possible. I think ps4 will be more static. While it has some good games I don't think they will move huge numbers of consoles.

I think 2017 will mark an increase over 2016 for PS4. The game lineup is amazing, and Japan sales are clearly up YoY.

For PS 4 yes probably but I dont see any reason for Xbox One, 2017 is not bigger than 2016 for it ( éven worse than 2016 id say since no Big AAA seller like Gears 4/Quantum Break ) and i doubt Scorpio will do that much ( unless its à new génération with "exclusive" games not on One )

I think the Scorpio will make XBox peak in 2018 I also expect a lot of good games in 2018 from microsoft, the next playground game from their forza horizon studio, halo 6 should arrive, 2018 will be a very very strong year for microsoft.

I expect PS4 sales to either have peaked last year or peak this year because this year ps4 has a much stronger software lineup compared to xbox and the pro has recently been released and should get a price cut when microsoft start their Scorpio advantage

Competition is great, competition is necessary lets hope both keep doing great

I think you think too much of the effect the scorpio will have on the XB1.

I think the PS4 peaking this year comes down to its pricing and how soo they start that pricing.I feel that this gen sony has been very slow to drop prices and to make matters worse, when they do they usually drop it by $50 reductions which I believe isn't "impactful" enough. If sony drops to $250 now and stays at that price then drops to $200(ish) around September/october. Then yeah, this will be its best year. 

Really hard to say. There are so many variables with these consoles that it is almost impossible to tell where their limits are. With every update, they become better and better at handling non gaming tasks which is extreamly vital to mass market growth. As they continue to get cheaper, it is going to be harder and harder for people to justify getting an Amazon Fire TV Box or Apple TV unit.

As they continue to gain app support via Universal Windows Applications, and the expansion to PSVR, both devices will become more and more competitive with PCs, and I fully believe they will replace the PC in many homes in time. I know the ideas that console can do more than play games can be quite unpopular in the gaming community, but it in truth is a huge reeason why ~160 million people had PS2. Non gaming functions are extreamly important to pushing past the core and casual gamers to the absolute outskirts.

Beyond that on the PlayStation side Sony is continuing to up their game on the services side, with PS Vue, PS Now, PS Video, and PS Music getting better and better with every update. Soon PS Vue will offer local CBS stations nation wide, and the other local stations will follow closly behind. IPTV is getting bigger and bigger, and PS Vue has a huge lead in features and content vs its competitors.

On the gaming side both devices have a lot left to give. PSVR is just getting started. Scorpio will bring VR to Microsoft, and with both manufacturers offering VR, we can start seeing a real push by 3rd parties, for AAA VR experiences. As mentioned by others PlayStation especially has a massive line-up of games coming. The first Gran Turismo of the generation, the first The Last Of Us, the first God of War, all of these are ~10 million selling franchises, that will be making their first appearance on PS4. They also have Horizan by Guerrilla Games, Dreams from Media Molecule, and Days Gone from Sony Bend which are all massive AAA 1st party games. Then they have stuff like Crash, FFVII, Wipeout PS4, Spiderman, and the PSP collection of games.

Looking at 3rd parties, we have Red Dead 2 coming, and we are still waiting on a Grand Theft Auto for this generation. Mass Effect is making its first apperance this gen in a few weeks. Tekken will be here in the Summer, Street Fighter V is starting to become a very good game. Ace Combat 7 is coming and looks like an absolute game changer in VR. Between HDR and VR we are going to have a whole new wave of games coming that absolutly blow away what we have seen from 2013 - 2016. Even stuff like Madden, Fifa, NBA 2K, PGA Tour Golf, Call of Duty, Assasins Creed, and so much more are going to get massive boosts as people start to see stuff made from day one with VR and HDR in mind. HDR is next gen TV, and VR is the successor to TV. So those alone, will help sell a lot of consoles.

So it is hard to say when this gen will peak. It could have already peaked, or it could just be getting ready to absolutly launch into places we have never seen before. The future of the business has never been so muddy. I honestly think we could be on our way to seeing console sales from both Sony and Micorosft climb year over year for the next decade, and maybe beyond.