PS4 or Xbox One What exclusive would persuade me to buy either?

[NobleTeam360]

Sunset Overdrive comes to mind.

Edit: For this year I can't really say I recommend getting a PS4 or Xbone. 2015 on the other hand is packed with games, so you could wait a little while longer. Unless Sunset Overdrive, Forza Horizon 2, and Halo MCC are must haves on the Xbones side.