I think the xbox one S seriously increased in value if the rumours about no 4k or uhd on the ps4 slim are true but overall I would deffenitely wait a little bit, some good deals will come following the 7 september unviels of the new sony hardware for sure.

you don't seem to know what or why you like one or the other, so I suggest you buy and ipad and play the games on that.

yeah I understand, I prefer the console experience but performance  is more important to me that's why I have a pc and thanks to big picture mode and other applications I can emulate a console setup. Xbox one s is good too, this is just another option :)

PS4:

Assassin's Creed: Syndicate

Ratchet & Clank

Uncharted 4: A Thief's End

The Elder Scrolls V: Skyrim - Special Edition

The Last of Us Remastered

Fallout 4

Bloodborne

Killzone: Shadow Fall

UNCHARTED: The Nathan Drake Collection

Borderlands: The Handsome Collection

Little Big Planet 3

LEGO Marvel Super Heroes

Assassin's Creed Unity - Limited Edition

Darksiders: Warmastered Edition

inFAMOUS: Second Son

Dragon Age Inquisition

Assassin's Creed Chronicles

LEGO Marvel's Avengers

Darksiders 2: Deathinitive Edition

The Evil Within

Dragon Quest Heroes: The World Tree’s Woe and the Blight Below

Grand Kingdom

The Witch and the Hundred Knight: Revival Edition

Dynasty Warriors 8: Xtreme Legends, Complete Edition

Steins;Gate 0

Dark Souls II

Dark Souls III

Tales of Zestiria

Murdered Soul Suspect

BioShock: The Collection

Megadimension Neptunia VII

Assassin's Creed IV Black Flag

Odin Sphere Leifthrasir

PSYCHO-PASS: Mandatory Happiness

Valkyria Chronicles Remastered

Samurai Warriors 4 Empires

Senran Kagura Estival Versus

Romance of the Three Kingdoms XIII

Gravity Rush

They all aren't exclusives, but they are better versions of their competition's counterparts.  And that helps keep my interest.

Well to answer your question. My PS4 is for mostly everything, and PC is for MMOs, and for Star Citizen (whenever it comes out). Xbox games is coming over to PC too.

Go for it. Like Nintendo, MS games are really ground on gameplay values.
They also are betting more and more on SP games if that's your thing instead of MP games.
It is a 4K streamer and has HDR features for games which is highly praised.
Also, not all MS games are going to PC contrary to what's being said here.

Go for it. It seems to me you don't own a gaming PC, or else you would have mentioned it I think. The Xbox one S is some seriously good value with what it has to offer. There are plenty of awesome exclusives on the system now, and a bunch of great console exclusives on the horizon.