I own a ps4, and right now there's not a huge selection in terms of exclusives. Killzone: Shadwfall isn't very good, Infamous: Second Son was too short, and The Last Of US is on PS3. The games that are on both ps4 and xbox one generally look better on ps4, though. Bloodborne is currently the big exclusive on the horizon and that's still a few months away.
I don't own an xbox one so I can't really comment on it as much, but from what I've seen it has similar issues in terms of exclusives. If I were to get an xbox one it would probably be exclusively for Halo, at least in the near future. The xbox one is also weaker than the ps4, so multiplats look slightly worse. I don't really know what big exclusives are coming out soon, but Halo: MCC just came out, which could probably last me months, assuming they fixed the matchmaking issues I heard about.
This weekend there's two different game events happening where games are being announced. TGA is this friday, and then Playstation Experience starts on Saturday. You might want to wait until this weekend to see if those announcements sway your opinion any
If you really like sony exclusives (Killzone, Uncharted/TLOU, Infamous) and play a lot of multiplatforms on console, ps4 is probably the better choice
If you really like MS exclusives (Halo, Gears of War, Forza, etc.) xbox is probably the better choice.
there's also the Wii U. If you like nintendo exclusives, go for it. It isn't getting many multiplatorm games whatsoever but it recently got a surge in exclusive games.