The game play is smooth.  no stutters or stops. 

Graphics: I noticed the image quality is way better if anything from the Xbox 360. Lines are more smooth, smoke and fire looks way better. reflections look real, the reflections on certain floors do not look blurry unlike on xbox 360. I also notice that textures are higher quality. 

Kinect:  I'm disapointed that xbox one barely has any basic free kinect games on launch to show off the kinects abilities. Only a fitness trainer and a sports rivals demo. They could of at least re-released some xbox 360 kinect games on the xbox one to show the difference.

My thoughts on the upcoming Xbox One.

The Xbox one seems to be one of the best gaming systems to date. Full of bells and whistles that gain the attention of everyone. 
Lets just say this, you might want a strong arm to help you carry this beast. With all those electronic bits jammed packed into that boxy case you would swear that your bringing home an instrument of perfect entertainment and guess what, IT IS!!!
Loaded with a bunch of goodies like free games that test the new found abilities of the Xbox One.
The new time of flight kinect sensor unit is impressive. No more lag when I punch a NPC in boxing. no more having to jump or dodge ahead of  time in pritty much any game for kinect. kinect games will be much better and not so bland on Xbox One.
The games you will experince will be better, the first bunch of games that are being made will be no where near what can be done when games come out in a year or two. Once the game developers learn better techniques you will have a hard time telling reality from virtual reality.

Xbox One specifications in Windows Experence Index. These are rough estimates.

Processor: 5.2

Memory (Ram): 5.5

Graphics: 5.7

Gaming Graphics: 7.2

Primary Hard Disk: 6