I compiled a list myself of what the big exclusives for Playstation 4 are next year(I'm not going to add some really small games or products like the Berserk game that will probably suck). For the sake of being completely unbiased I added whether or not they were "exclusive", "PC/PS4" exclusives, or exclusive to playstation consoles(Vita/3/4).
Gravity Rush 2 (January 20, 2017) (exclusive)
Tales of Berseria (January 24, 2017) (exclusive)
Yakuza 0 (January 24, 2017) (exclusive)(RUMORED for PC)
Nioh (February 7, 2017) (exclusive)
Horizon: Zero Dawn (February 28, 2017) (exclusive)
NieR Automata (March 7, 2017) (PS4/PC exclusive)
Persona 5 (April 4, 2017) (PS3/PS4 exclusive)
Hellblade Sensua’s Sacrifice (2017 TBD) (PS4/PC exclusive)
Crash Bandicoot: N. Sane Trilogy (2017 TBD) (exclusive)
Detroit: Become Human (2017 TBD) (exclusive)
God of War 4 (2017 TBD) (exclusive)
Days Gone (2017 TBD) (exclusive)
Knack 2 (2017 TBD) (exclusive)
Spiderman (possible for 2017) (exclusive)
Shenmue 3(possible for 2017) (PS4/PC exclusive)
Death Stranding (possible for 2017) (exclusive)
Uncharted The Lost Legacy (possible for 2017) (exclusive)
Ni No Kuni 2 (possible for 2017) (exclusive)
I tried to organize it by speculated release date, but also a bit by likely hood as well. Shenmue 3 - Ni No Kuni 2 are the most likely NOT to release next year. This is the point where people are going to say "There's no way they'll have that many exclusives, Sony always delay their games." Well I'd have two respond two ways, A: Does it even matter? With the amount of exclusive titles on the Playstation 4, even God of War getting a delay wouldn't be disastrous for Sony. Keep in mind all of Sony's big exclusives have sold significantly better than their predecessors on PS4(except Ratchet...understandably). God of War could potentially be an 8 Million seller and yet if they delayed it to 2018, I honestly think their line up would still be just as strong. The second response would be that the amount of variety in their line up makes it better than Xbox's either way. And this is coming from a PC gamer.
That leads to 12 titles confirmed to be exclusively on PS4 and NO other platform, with 10 of them basically confirmed for 2017, and Uncharted's DLC and Spiderman being incredibly likely to release in 2017. So ya, basically 12 purely exclusive titles, because Uncharted DLC shouldn't take too long to develop, and Spiderman will want to release near it's movie release. Also, if Ni No Kuni and Death Stranding(very unlikely) come out in 2017, that wil boost it up to 13-14.
Persona 5 is also coming to Playstation 3, though the install base of the 4 is more than half of PS3's, so I think it will see healthy success as a Playstation exclusive on 4. Still, I guess it isn't a "true exclusive".
Out of the entirety of the list I made, which focuses on Triple A or "Double A"(decent budget) games, only 3 of those are confirmed for PC. That means a wide majority are exclusive to Playstation 4, with only one being a Playstation exclusive(on PS3 as well basically) and a few being on PC. That's much better than Microsoft's "exclusives".
I'm basically interested in every game I listed, one because I haven't experienced many video games including the ones from the series listed(such as persona), two because the new IP's look hype af(Horizon, Detroit, Days Gone), and third they're all HUGE games. They mean a lot to gamers, even the japanese games are pretty big over here.
This is why I'm glad I have a ps4 despite having almost no fun with it since getting it for Christmas in 2013. I've still had much more fun with Infamous Second Son than Halo or Gears of War, despite being a huge fan of the latter and new-ish to the former.
Edit : Sorry I didn't add Dreams or Wild, I simply don't know enough about the games and if I'm correct only their teaser trailers have been released?
