"Roussain estimates that there are probably only 500,000 true virtual PCs (meaning PC images running from servers over the network) at the corporations of the world..."
How the fnord is that possible. I work at a company that has, oh, 60 people-ish, but does the data volume of something 50 times our size. 90% of our "desktops" are Windows XP living in a VM running on a server in our datacenter, with [random Linux boxen] to RDP in. Run office, communicator, the Point of Sale app, etc. etc. etc. all inside the VM.
Every single one of our servers, rendering boxes, number crunchers, DBs, DCs, E-mail servers, you name it are also virtualized. Whitebox stuff too, not exactly running ESX here. We're moving to second generation stuff now, replacing our older generation of virtualization servers with 2x Single Core CPUs with newer gear, and upping the VM density per rack.
There's probably, in a company of 60 people, 150 VMs, when you include all the servers, web appliances, and desktop environments. How is that abnormal? Everyone else seems to be doing it, and I can not possibly imagine life without virtualization...given the amount of gear we have to take care of, virtualization is an unbelievable time saver.
If we can virtualize to this level with whitebox gear on a shoestring budget, then how is it that everyone and their dog isn't doing the same?
It truly boggles the mind.