VMs on ESXi run Windows and Linux operating systems near flawlessly. It’s also a powerhouse for many sizeable virtual desktop deployments running on VMware View or Citrix XenDesktop. And more recently VMware was in the news because they will soon power Google’s Chrome virtual desktop cloud and provide access to Windows application. How cool is that!
The primary disadvantage to using a VPS is its lack of performance. The organization that provides the VPS will typically throttle the server's performance in an effort to maximize the number of VPSs that the physical server is able to accommodate. In the unlikely event that the VPS's performance is not throttled, it then becomes possible for an adjacent VPS to consume excessive resources, to the point of impacting the VPS's performance.

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The force driving server virtualization is similar to that which led to the development of time-sharing and multiprogramming in the past. Although the resources are still shared, as under the time-sharing model, virtualization provides a higher level of security, dependent on the type of virtualization used, as the individual virtual servers are mostly isolated from each other and may run their own full-fledged operating system which can be independently rebooted as a virtual instance.