There's still some stuff going on, but it's quite dead yeah. In the broader scope of RTS games you still have stuff like Age of Empires 4 and Beyond all Reason, both of which I find a lot of fun. But neither are really much like C&C. What is like C&C is Tempest Rising, which is currently under development. I played the demo and it did feel very C&C like, which is good, but time will tell how polished it will be on release.