Division is what I think will be the first game we see to live up to the Next Gen name. With the smartglass enabled there is a lot of potential for this to be great. OHHH and don't forget Project Spark.
I've researched just about all the XBox One games up to this point, and I have to say Quantum Break is the one that stands out to me the most so far. It looks amazing, and I can't wait to see more of it as the release date approaches in 2014. I'm also looking forward to trying Kinect Sports Rivals and the new UFC game next spring. The XBox One exclusives really stand out to me compared to PS4.