MGSV - This one is cross gen, but I want the next gen experience. Experiencing it on PS3 is not enough for me.
Smash Bros. Wii U
inFAMOUS Second Son
Final Fantasy XV
KH3
Sony IPs in general - I take great pleasure in playing games from Naughty Dog, Guerrilla Games, SSM, etc, so naturally I will buy a PS4 to experience their games.
Playstation = The Beast from the East
Sony + Nintendo = WIN! PS3 + PSV + PS4 + Wii U + 3DS