Cloud Clients is the term used to refer to the devices and often the devices' operating system that are used to access Cloud Services. Some examples of these include: Smartphones, iPhones, netbooks, iPad, thin clients, thick clients (AKA fat client), and so on.
Thin client - often refers to a computer that has very basic functionality, and mainly offloads the bulk of functionality to a server.
Thick clients ( fat client ) - A computer that doesn't need or rely on a server to run. A typical computer is a thick client.
With Cloud Computing, whichever cloud client you use to connect to your Cloud application or Cloud desktop, that device is acting more in the role of a thin client. Whereby it is essentially getting you connected to the Cloud where all the work is actually being done.
Companies can save hundreds of dollars in the hardware /software savings alone, by replacing expensive notebooks with various types of more cost-effective Cloud Clients. The savings with Cloud Computing and cloud clients doesn't end there however, and a cloud client can take a fraction of the time to setup than a typical computer or notebook would take.