From what I've seen so far, Dead Rising isn't just the best retail launch title on Xbox One, it might be the best launch title across both next generation consoles. Think zombies. Think Saints Row. Think inventive wholesale slaughter. That's Dead Rising 3.
The selling point for the game, and what makes it a 'next gen' experience, is the scale of it. The amount of zombies shuffling around the landscape, the massive variety in how you can dispose of said zombies. That's what makes Dead Rising unique.
This video from IGN is pretty cool. It shows off a 'thousand' different zombie kills and while I didn't take the time to count and verify their '1000' claim, there are a lot of deaths here, and they are fun to watch.
Have at it.