It's server software that Citrix is selling cheaper, another company is selling even cheaper and Microsoft will give away in a couple of years. It is the next Google though and if I had been important enough to my broker I could have bought some and just been deciding what day in the near future to flip it. It certainly isn't a long term investment and is seeing terminal market value at the moment.
Those offerings that you mentioned, from personal experience don't even come close to performance or quality not to mention the already growing third-party applications for physical to virtual migrations etc.
In a nutshell it allows companies to run for example four instances of server operating systems on one physical server. It saves a company money because now they only have to purchase one physical server whereas in the past they would have to purchase four physical servers to do the same job. Not only does this save in hardware costs, but also in utility costs.Being that I am in the IT industry I can tell you that IMHO there is no other company that even comes close to VMWare's offering in quality or performance.
Thanks. However, still sounds way too specialized to even begin to be compared to a MS or Google. My grandmother googles, but will have no idea of what VMware does. It has no mass appeal. Sounds wonderful for IT guys, though.