Looks really like Orbis-UI :P

Don't know.  I actually think the black background is incredibly smart.  It creates a seamless border between the mask on the TV and the contents of the screen.

If for nothing else, for the pictures it makes the contents of the screen pop.

Looks really like a dinner table with square plates :O

Yes, but it still has to download that initial chunk of data before you can start. This is probably a pop up notification to let you know you are at the point where you could begin playing.

Just throwing ideas out there.

i could be wrong but i think you can replace the black.  i know for sure ps4 allows you to change the blue and i vaguely remember it coming out at the same time that it could also be done on xbox but so far there are no screens. 

..or i could just be completely wrong.

we all know that is partially true.... you need the engine and game libraries for the first few levels.... so even with a good connection it would still take a few minutes to be able to play a game I would

It's Windows 8, ok.

Looks stylish, minimalistic and anyone used to Windows 8 or Windows Phone should feel at home...

welll yeah I love the black BG.... but I usually put black and white  pictures of relatives (i don't have many printed picture in the house and since the XB1/TV is where I look the most when relaxing I find it to be a great spot for these :D)

Yes, either that's SmartMatch notifiying you that a game meeting your specs is ready or it's a notification letting you know that the game invites for the game you wanted to play have been accepted.