Well I was not impressed at all by the graphics improvement as they are just gimmicks (and I guess we'll see a 2013 full of fairy particles now), but anyway considering the actual games level of visual realism, it's useless to search for improvements (unless we're searching for coder porn). edit : Oh except for the lighting's iris adjustment, I loved that. The real part where I appreciated the demo was the Editor, starting at 4:40. Especially 2 things : - real-time state machine state viewer - real time compiling while not having to relaunch the game Those are not essential features, but clearly they can save a lot of time while debugging (especially first one). Overall, I also found their Editor to be more and more impressive. Check it out.