Ubuntu is definitely an operating system suitable for heavy activities, when, in our workflows, we tend to use workspaces for various reasons (more space, efficiency, optimal window management with, for instance, text files on a workspace, web-browsers on other workspaces, etc, fast access, etc).
Ubuntu ships, by default, four workspaces that can be summoned by clicking the Unity launcher's Workspace Switcher, action that exposes the workspaces, clicking on a particular workspace, redirects the user to the clicked workspace.