A few days ago CS:GO player was overwhelmed with a major update from Valve's Panorama UI. Although still in beta stage but we can enjoy or try it in your respective steam.
According to my own Update this I do not really like because the display is arguably too lively what Valve did not update this look during 2012 I became accustomed to the old look.


For those who want to try it is Right Click on CS:GO game >  Properties. 


Then click on Betas > select demo_viewer .
it will download automatically and please wait if it is finished you just run Game CS:GO and see the changes on the main menu display.
And to return to the original view, on the Betas section select the top None.
 

That is the update details of Valve many people call this is the greatest update during 2012.