Sorry for Nintendo trolling but your title was asking for next-gen exclusive with the biggest impact.

As to answer your question, TitanFall will have a much greater impact. First it's a new IP. By the time March comes around we'll be welcoming the idea of a new FPS.

Infamous is going to be one of three game coming out in Q1 that's action-adventure. The other two game being Thief and Watch dog. I'm more looking forward to playing WAtch Dog then Infamous Second son, From the trailler they explain that the main character is a 24 year old graffiti artist with social issues. I can see this going either way .... either he evolves as a character and you will really start carring about him or I could easily see that this brat kid just start annoying you and reduce your overall game enjoyment.

So on Xbox one you got a FPS TitanFall and a Action-Adventure game in Watch Dog.

On PS4, your getting overloaded with Action-adventure games. 

Errr... not shared with other consoles?

no, i wanted this to be a Infamous/Titanfall discussion, the reason being: the consoles will have only been out for a few months, and they (infamous?titanfall) will be heavily competing against each other, as they only release a 10 days apart