Are Virtual Dedicated Servers Worth The Cost?

xtremex asks: "I just had an online conference with a company called Ensim and they have made an appliance that takes all the servers in your data center and chops them into 'virtual' dedicated servers, so instead of a dedicated server client wasting 50% of his space and server power, it'll take one server and issue a percentage of processor power, memory and disk space, each virtual server having their own root password, etc., and a Web based control panel for both resellers and owners...this thing got me salivating..until the told me the price..$25,000. I almost fell off my chair. It looks REALLY good, but is it worth $25,000? They even offered to come down and install it and I have the unit for 30 days free..Does anyone know about this amazing product? Is it worth the price?"