At the moment I'm playing World In Conflict. It's an RTS game playing with the idea of the Cold War turning hot and the Soviet Union invading Europe and USA. On the graphical side it's got plenty of very nice ideas. For example, you can destroy everything in a map. Burn down the forests, blast houses to pieces and even the terrain deformes from grenade explosions (the nukes leave a massive crater), affecting unit movement. As you can see from the screenshots, you can zoom from the birds eye view all the way to the grass level.
The game features a relatively short 14 mission singleplayer campaign, but the multiplayer is where the fun begins. You can have up to 16 players in a server resulting in eight versus eight games, where each of the players controls one of the four available branches - armor, air, support or infantry. One branch is not good at everything, so you better be a teamplayer. The gameplay is actually rather simple, based on a rock-paper-scissors idea, where helicopters kill heavy armor, anti-air support defeats helicopters, armor defeats mobile anti-air artillery and so on. It's not that simple, but you get the idea.
Here are a couple of screenshots involving tactical nuclear weapons from the multiplayer:
The enemy got a little trigger happy with the nukes: