The screens are pre-populated, yes.  But it is an actual representation of the UI and what he was doing with the UI was real-time.

They have said, on more than a few occassions that the UI screens have been pre-populated.  There is no way they could have had images of the UI with various inset images available without the information being pre-populated.  However, that's an aspect of the UI.  That being the ability for the UI to make a network connection, retrieve the layout info, pull down the images and display them.  When you don't have people actively creating content for a new version of LIVE that the content team doesn't actually have access to, yes you're going to use pre-populated pages.  Even Bing.  I'm sure at that point in time it was the only way to ensure that you consistently had content, considering people were and are still, actively working on things.

The operation of the UI was real-time.  There was no clicker.  You can hear, in the video, through his mic, the Xbox One making noise when he issues voice commands.  If that was a slide on a laptop, you wouldn't hear that.  Not to mention the times when his hands are completely out of his pockets and he's interacting with the UI either through voice or gesture. 

Ok fine.

Just show me the UI working like the presentation even my HDTV have response time delay lol... and MS says they didn't showed the UI to the public yet and I'm the wrong guy here... right... blame me for the MS mistakes .

As I've said in another post which you're probably reading right now, the content was prepopulated, yes, but the actual demo of the UI was live and demonstrated the actual functionality of it at that time. 

Pre-populating content to demonstrate a UI goes on on a daily basis.  The actual functionality of the UI is still there and it's real-time, the content just isn't live real content.  So, instead of connecting to a SQL database, pulling down an XML file that instructs the UI to display content, then populating the screen with that content.  They already have an XML file on the system that the UI gets populated with.  It doesn't mean when I snap something I'm not snapping it, the functional operation of the UI is there.  The content is (in a manner of speaking) just hard coded rather than generated.

To suggest that the reveal UI presentation was fake is disingenous.  It was not.  They demonstrated the UI by using the UI.  The only thing "fake" about the reveal UI presentation was the fact that the content used (i.e. the movie, music, tile images/titles, and a Bing background image) all used pre-populated content to ensure they had the content they intended to display and consistently displayed the same UI.

Do you honestly think Microsoft is actually testing the console against live, in production servers?  Hardly.

There's a bit more to the UI than what they have shown and the UI has changed dramatically since the reveal presentation.  No one can deny that.

The thing that Xbox fans are interested in seeing is:

Messaging.
Party Chat.
DVD/Blu-Ray functionality.
Personal content streaming (i.e. from the PC to the Xbox One or vice versa)
An official demonstration of how the the UI works in-game.
Just in general, how everything works.

If I were a PS3 gamer, getting a PS4, I would be interested in how everything worked in the PS4 too.  It's simply just a matter of wanting to see it in action.  The reveal presentation was nice, but it didn't delve into nearly the feature set that people are most interested in.

Yeah the reveal UI demo was fake. Kind of common knowledge at this point. Surprised to see argument about this lol

Please understand..

Playing to the tune of ethomaz, that Twitter share actually proves nothing. That entire thing could have been pre-recorded/scripted/faked. All they had to do on their end was make a post to Twitter at the correct time. Incredibly easy for Sony to do even without actually sharing it from the supposed PS4 from the presentation. I watched the videos, and you never really see him actually using the controller to do anything...

Just saying... :)

Moderated,

-Mr Khan