I like the fact that saving a clip on the X1 doesn't rip me out of the game and into the Share UI. This isn't so much a problem on the PS4 during single player games but during multiplayer it's a pain in the dog and sometimes the UI takes too dang long to load if there is a lot going on.
for mp an easy way to do that is to set up the recording session at the start of a match by double tapping the share button it will start recording at that point and not take you out of the game.
Released: Dead Rising 3
Upcoming: Sunset Overdrive and Fable Legends
Honorable mentions: Spark, Crackdown 3