Is server virtualization worth the risk?

I think it worth it if you consider the cost.

Dear,

With Virtualization you can consolidate your servers into one physical server. you don't have to buy a server for each role you want to add it to your network.

It also gives you a good way for backing up your virtual machines.

Yes because its got easier backup procedure

Virtual Server will worth , if you looking for avilabilty , and cost , but before you go with one step you have to calculate and collect information for what you need from  each server.