Citrix has created a return on investment (ROI) calculator for centrally-delivered virtual desktops, using Forrester's Total Economic Impact™ methodology. This novel tool compares acquisition and operation costs of four kinds of desktops; datacenter- based virtual desktops, PC blades, terminal-services-based desktops and traditionally deployed desktops. Optionally, users can include potential revenue gains from virtual desktops in the aggregate ROI. Using conservative default assumptions, Citrix XenDesktop may reduce desktop operations costs by an average of 40% and pay for itself within 6 months.