The DualShock design has remained fairly consistent since its introduction in 1997. Even the DualShock 3, with its motion controls and curved analog triggers, looked almost just like previous incarnations. Sony is changing all that with the PlayStation 4, and (Sony's) developers couldn't be happier.
Sony released a new video detailing the DualShock 4 and what developers think about it. Those speaking are internal Sony developers so they are somewhat obligated to love the new controller. That being said, there does seem to be a lot of love that went into the controller, and Sony says that it was designed with input from studios around the world.
While it's nice to know a bit more about the controller, gamers are eager to get a look at the actual PlayStation 4 hardware itself. We probably won't be able to see that until E3 in June though. Until then, we'll just have to make due with more videos about the DualShock 4 and other PS4 services.