Only Infamous as of right now.

Every 3rd party gaming running better, plus everything Sony has prooven to bring to the table for the last 18 years. Knowing that we will get great games and franchises from Sony Santa Monica, Naughty Dog, Guerrilla Games, Polyphony Digital, and the rest of SCEWWS.

Knack and The Witness are the games that sold me on the PS4

I personally would've thought nothing of the PS4 reveal if Knack and The Witness were not there

Honorable Mention:

DelayClu.. I mean.. DriveClub was the other game that kind of sold me on it but DC doesn't really look as good as it did at the reveal to me

Read the op and notice it says multiple things other than just games.

I'm really getting tired of your attitude in every one of my threads.  More so that in two threads in the last 48 hours Ive had to tell you to read the op.  This one which is a few lines.

for me right now its Infamous SS, easy. i have played all the infamous games, and while awesome to play, they always felt they were limited, by their budget or ps3. Second Son is their first game on new hardware. The only limitations they should have is their own ingenuity. when they say you will be able change powers on the fly, it makes sense to me because i have played all their games and i understand why that line alone is very important.

Killzone. I have always love the Killzone art style and lore. This game for the first time feels like that have giving up on being a better version of another game. its not trying to be a Halo killer or COD killer. Its doing its own thing and that attracts me. I dont care about multiplayer. I will buy and play this for single player alone, maybe co-op.

The Order. I want this game. I know nothing meaningful about gameplay so I cant get too hype. BUT potential is through the roof.

Infamous Second Son... Damn.

owning a vita is the only reason i want a ps4. i like offtv. no game yet.

Nothing as of now, Kingdom Hearts 3 and Final Fantasy 15 are my main reasons but it will be a long time till they are released.

For me it is too soon to choose a console. I say wait for the consoles to build a good library and then judge, that is what I will probably end up doing.

Many games

Uncharted series
The Last of Us
Demon's/Dark Souls
Metal Gear Solid V
God of War
Gran Turismo
Ratchet & Clank
Infamous
LittleBigPlanet
Heavy Rain

and many more

Compulsory Kinect and the old vision of the XboxONE and it's always online DRM.

Those are the reasons I now own a PS3, Vita and have a PS4 pre-order.