Killzone SF a solid 8/10 based on SP alone, I really like the pacing and more open level structure. Not to mention the visuals are simply the best I've ever laid eyes on, period. Haven't had enough time with MP, but I've been thoroughly impressed with what I've played thus far.
AC4: Haven't played enough of this yet, but already know I'm going to enjoy it as much, if not more, than AC2 (my favorite in the series). I can't rate it just yet, but will say that it running natively 1080p will ensure I don't forget about this title in the shuffle, it looks damn good.
Need for Speed Rivals: Another solid 8/10. The Dark Souls-esque experience system is nerve wracking fun, and playing with other racers (almost) seamlessly is great fun. The graphics are stunning in 1080p, and I seem to be popping this title in for incremental advancements at every chance I get.
Resogun: This game! 9/10. You all know the deal, and I don't need to say much. It's fine tuned, shooting bliss, graphical euphoria. Love it, just need to get better.
Contrast: Haven't played enough of this yet, but can say that I'm simply glad I have this game. It runs beautifully in 1080p, and it's slowly unwrapping a very interesting little story, a great game to unwind to after a long day, or as a palette cleanser.
COD Ghosts: 8/10. I like COD. They made a lot of adjustments to the leveling system, so many that I feel overwhelmed with the options available to me. I don't play many other modes other than MP, but I will go through the SP because I'm a fiend for 1080p gaming. My eyes can't get enough.
Battlefield 4: This product not yet rated. They need to fix it before I can give an assessment of its quality. I will say that the games I have successfully entered were excellent, the game is stunning visually. I played BF3 on PS3 for a very long time, and this is a dramatic improvement in the performance and visuals category. Now fix the network EA.