Todays computer have more power than what is required by a single users. Thanks to the Gigahertz race, processors are getting faster and faster. The result is that an average Joe uses only 10% of the processing.
The best way to harness this underutilised power is to get multiple users to share the resources of the same computer.
One way is Utilise NComputing device or to setup a dual-head display on your computer and follow this howto.