If it helps, here are the major exclusives for the x86 consoles. These lists are going to look somewhat short, as they exclude games that, while not being on the competing x86 console, are on PC, PS3, 360, or Vita, and therefore aren’t actually exclusive. It also excludes Japanese games that aren’t likely to leave Japan, such as Chaos;Child on Xbox One and Onechanbara Z2: Chaos on PS4. (I’m using the lists on Wikipedia, so I apologize for anything that might appear here that’s not actually exclusive; their lists seem to be good, but I didn’t investigate everything, and noticed inaccuracies like God Eater 2: Rage Burst appearing in the “full exclusive” category on PS4 despite also being on Vita.)
Xbox One:
Crackdown 3 (announced)
Crimson Dragon (available now)
D4 (available now)
Dance Central Spotlight (available now)
Fable Legends (announced)
Forza Motorsport 5 (available now)
Halo 5 (announced)
Killer Instinct (available now, and it sounds like Iron Galaxy has done good work on Season Two)
Phantom Dust (announced)
Powerstar Golf (available now)
Quantum Break (announced)
Raiden V (announced and possibly not exclusive, but we don’t have any details at this point beyond “Xbox One release”)
Scalebound (announced)
Sunset Overdrive (out soon and looking great!)
PS4:
Bloodborne (announced)
deep down (announced, and apparently stuck in development hell)
Disgaea 5 (announced, but you just know this is going to get a Vita port later on)
Driveclub (available now)
Everybody’s Gone to the Rapture (announced)
Fairy Fencer F: Advent Dark Force (announced)
Gran Turismo 7 (announced)
Hot Shots Golf (announced)
Hyperdimension Neptunia Victory II (announced)
inFAMOUS: Second Son (available now)
Killzone: Shadow Fall (available now)
Knack (available now)
Let It Die (announced)
Omega Quintet (just came out in Japan, and though we have no details about a western release, it definitely looks like the sort of thing NIS America would pick up for localization)
Ratchet & Clank (announced, and I hope this has “The Movie: The Game” as its subtitle)
Resogun (available now)
Rime (announced)
Silent Hills (announced, and in the same situation as Raiden V above)
Tekken 7 (announced; the arcade hardware seems to be based on the PS4, but it might not be exclusive despite that, and we have no other details confirming either way)
The Order: 1886 (announced)
The Tomorrow Children (announced)
Uncharted 4 (announced)
While the Xbox One’s situation may look dire as presented here, note that four of its major “exclusives”—Titanfall, Dead Rising 3, Ryse: Son of Rome, and Rise of the Tomb Raider—aren’t on this list because they exist for other non-Sony platforms, while the PS4 list includes multiple titles that might not actually be exclusive (and aren’t out yet, in any case). The rest of it comes down to Sony having strong internal development.
And, just for comparison, the Wii U, featuring far fewer titles with “Rise” or “Fall” in their names than PS4 or Xbox One:
Bayonetta 2 (available now)
Captain Toad: Treasure Tracker (out soon)
Devil’s Third (announced)
Donkey Kong Country: Tropical Freeze (available now)
Game & Wario (available now)
Hyrule Warriors (available now)
Kirby and the Rainbow Curse (announced)
LEGO City: Undercover (available now)
Mario Kart 8 (available now)
Mario Maker (announced)
Mario Party 10 (announced)
New Super Mario Bros. U and New Super Luigi U (available now; I’m not giving NSLU its own line because it’s technically DLC, even though it got a standalone release and is pretty much another full-length game)
Nintendo Land (available now, and actually pretty cool)
Pikmin 3 (available now)
Shin Megami Tensei X Fire Emblem (announced)
Sonic: Lost World (available now)
Splatoon (announced)
Star Fox (announced)
Stealth Inc. 2 (announced, but man, the console versions’ title is so boring)
Super Mario 3D World (available now)
Super Smash Bros. (out soon, and while I’m hesitant to include it here due to the existence of the 3DS version, no other game in these lists is in quite the same situation as this one)
Tank! Tank! Tank! (available now, and I totally forgot this game exists)
The Legend of Zelda (announced)
The Wonderful 101 (available now, and absolutely amazing)
Wii Fit U (available now)
Wii Party U (available now)
Xenoblade Chronicles X (announced, but man, what a clunky title)
Yoshi’s Woolly World (announced)
ZombiU (available now)
Again, the numbers here mostly come down to strong internal development, as well as the Wii U coming out a year ahead of the other two platforms. There are also a few casual-focused titles there from when Nintendo was still trying to grab that audience.
Based solely on what’s available right now, I wouldn’t recommend an Xbox One or a PS4 at all yet. We’re nearly a year into both platforms’ life, and they’re barely putting up a dozen exclusives combined. Most of the major “exclusives” not listed here (and most third-party releases) are on or coming to PC and last-gen, even if they get delayed by a few months, and Sony in particular has had a hard time breaking out of this situation, thanks to their audience in Japan refusing to adopt new hardware without games (which is why most of the PS4 games announced at their pre-Tokyo Game Show event are also on PS3 and/or Vita). On the other hand, if you’re into anything Nintendo’s offering at this point, the Wii U has over a dozen exclusives available right now, and the hardware can be purchased for far cheaper than a PS4 or Xbox One.