Bernd Harzog, analyst at http://www.virtualizationpractice.com, reviews new innovations in desktop virtualization that are driving down costs and improving usability.   Here's how he describes Kaviza:

 "Kaviza is determined to provide a VDI solution that leverages a scale-out architecture to provide a dramatically lower cost of purchase and deployment and a dramatically lower cost of operation than traditional VDI solutions.  Kaviza does not require a SAN, and simply collects commodity servers with local storage into a resource tool which is managed with a distributed virtual appliance administration system."