Hyper-V's been out all of 6 months? Who would bet the farm on something that new? VMWare had its licensing issues recently, but other than that it's been rock solid in the server space for as long as there's been a server visualization space.

Comparing Hyper-V and Vmware on price is vacuous argument. It doesn't take a degree in business to see that microsoft charging $28 for Hyper-V is selling it below cost to try and kill off VMWare. Of course, while it costs $28, you've got to run it on a windows server, so that's another kilobuck.