The SCS team keeps on looking for bugs in-game. Because of all bèta-movies SCS published, it's hard to show us something new, for this reason they show us all pieces of art and sights that will appear in ETS 2. 8 people worked hard on all those pieces of art. It was a hard job and it took a lot of time to realize all of this in ETS 2.
If you bought ETS 2, don't forget to update frequently! Because SCS will continue improving the game after it's release.