So since I have both consoles, and have had both for a sizable amount of time, thought I would post my thoughts...
1.) If you like baseball, get the PS4. MLB 14 The Show is the best game on the market. And it will only get better with every release. Plus, your "Road To The Show" save file will carry over from release to release now.
2.) If you like multiplayer games, get the PS4. There's no question that the multiplatform multiplayer games run better on the PS4. Battlefield is one example.
3.) If you like COD, however, get an XBOX One. More people play COD Ghosts on the XBOX One than the PS4. You get the DLC a month earlier on the XBOX One. You will still get the DLC a month earlier when Advanced Warfare releases.
4.) If you like exclusives, get the XBOX One. Halo. Gears. Forza. All incredible games. And with the Halo Master Chief Collection coming out, oh man, that game will be taking up so much of my time. And imagine if they did something similar with Gears. Gears 1-3 in one package? Yes please.