
The article seems to miss out on the fact that many of the fortune 500 companies (and others like quite a few financial institutes such as banks and insurance companies) are already in on the VMware boat and have large clusters up and running. The step from the current incarnation of VMware's infrastructure as it currently fills up many data centers to what they now call Virtual Datacenter OS is small and it is mainly an extension of the management products.
The hypervisor itself is not the core anymore of what they are marketing. Heck if you have a 100 CPU box with a terabyte of memory then you can download the FREE ESX3i product and start slicing up your server box. Now today, not tomorrow and no windows 2008 server tax needed It also supports a hell of a lot more as just windows and one linux flavor. Managing those infrastructures using the products from VMware is easy.
Not sure what the AS/400 remark is about as you cannot expect your mainframe to run within an X86 platform. It makes about as much sense as asking why it doesn't emulate an Xbox360... because it doesn't have to.
It is an absolute pleasure to work with the product and being able to take your virtual machines to so many platforms without any hassle. Taking your windows 2008 VM from the main cluster, run it on under a machine under linux without ANY changes, then use that again on your customers PC under windows to showcase some new SQL2008 features and finally - after dropping a CPU from the VM - use it to debug a SQL2008 problem on a Mac Book Pro while on the road is only possible with VMware. Show me another product that can do the same and I'll be happy to use it.
VMware is here to stay and if you don't like it.. then that's YOUR problem. :P
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Wila