I was at Eurogamer in London yesterday and i was playing in a huge LAN on Battlefield 4 for 10 minutes, we were all told we were some of the first gamers in the UK to actually play BF4 on an actual X1 console.
The game played and looked awesome in my opinion, the graphics looks so good compared to BF3, it really did look nextgen to me compared to current gen consoles.
I have no idea what the resolution was for this game and frame rate but i left the show extremely satisfied and any doubts that i may have had whether i was doing the right thing in going for an X1 quickly subsided!
As for the controller i loved it, and for anyone that doesn't know the X1 controller has impulse triggers which means each trigger independently vibrate at appropriate times and the rumble experienced was pretty powerful, i loved it.
Roll on November 22nd as i want the console now!