Do Citrix and VMWare fail to deliver a complete centralised desktop offering?

Hosting desktops or applications on servers located in the data center, and implementing centralized computing technologies is one of the best ways to cut IT costs while also improving security, reliability, productivity and efficiency. Both Citrix and VMWare have high profiles offering their respective virtualisation solutions that enable centralisation. Yet if you are considering centralisation, do they offer your organisation a focused solution for your needs?