Cloud-in-a-box, also called cloud-in-a-can, is an all-in-one private cloud solution. It’s a way to deploy cloud services quickly with a mix of hardware and software that function as a single appliance. With normal cloud deployments you still have an environment with multiple devices. That’s different from cloud-in-a-box, which is normally thought of as a single product.
The first thing that comes to mind when talking about the benefits of cloud-in-a-box is speed of deployment. One vendor boasts about getting everything set up in just 12 minutes. In the old days that all might have taken weeks or months. And it would have cost a whole heap more.