Warhammer 40,000: Dawn of War II is the latest installment in the Dawn of War series, and features a single player campaign with a strong focus on combat. The new campaign puts you in command of several squads of Space Marines, each controlled by a captain. Each of these captains can be given upgrades to their stats and weapons. There is no resource management, and mechanics focus mainly on strategy. Units realistically take cover, units can enter buildings, and will not jump into the middle of a firefight.
Here are some screens:
(http://community.dawnofwar2.com/blogs/wp-content/uploads/2008/07/battle_med_01_hr1.jpg)
(http://community.dawnofwar2.com/blogs/wp-content/uploads/2008/07/building_01_hr1.jpg)
(http://community.dawnofwar2.com/blogs/wp-content/uploads/2008/07/dread_sync_01_hr1.jpg)
As you can see, Dawn of War has also received a graphical update. The new engine takes advantage of HDR lighting and other innovations.
Here is the latest gameplay footage:
http://www.gametrailers.com/player/40922.html