Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
Cloud computing is a relativity new computing concept where resources are provided via the Internet instead of on the local computer or network. One of these resources can be an entire operating system (OS), or at least Web applications that try to mimic Windows and other OSs. This resource is commonly referred to as a Web OS.
One of the points behind Web OSs is to relieve the local computer of the work; to put the computing power behind a central server. It's virtualization over the Internet. The client or end user computers don't have to be regularly maintained; they just need a Web browser. For example, applications can be globally installed or uninstalled from the Web OS server instead of on each PC.
Web OSs also has advantages for the mobile worker. You don't have to setup remote desktop connections. Web OSs already live on the Internet. You can log into your desktop at home, work, or on the road.