Dust2 has always been the most iconic map in Counter-Strike through all the iterations of the game. For those who played back in 1.6 Dust2 a different beast. When CS:S(Counter-Strike: Source) was released Dust2 had the same layout, but a different feel, still Dust2 Was the most played map back then. Most recently when CS:GO(Counter-Strike: Global Offensive) was released Dust2 was refined even more, and people stilled loved it.
Redesigns of maps in CS:GO was been the largest updates to Counter-Strike the last couple of years. And to be honest most maps have been in dire need in CS:GO. de_train was a classic in CS 1.6 and CS:S, and after the redesign the map has been played a lot more by professionals and casuals alike.
This time Dust2 is the next map to get a completely new look, and today we got a sneak peak into what the "new" Dust2 gonna look like! Also new player models has been added
If you are interested in trying out the redesigned dust2 you will still have to wait for the map going live. But at the moment you can opt in for the beta and try it out in there.
For more pictures, reasoning on design and more check out the post from the developers: http://www.counter-strike.net/dust2/