Legend11 named off a lot of good reasons to get an X1 I didn't even think of. I think it comes down to:
-EA Access (instant library of games, mainly sport stuff)
-Backwards Compatability (play older 360 games)
-MCC collection ( quick play sessions/splitscreen)
-If you get Kinect there is dance central spotlight and kinect sport rivals.
-Great for multimedia. If someone wants to watch TV you can snap netflix or cable while someone else is playing a game.