VMware announces free ESX - or: The gorilla effect?

VMware announced a free version of their ESX server product. Well, this may be an effect of the 500 pound gorillas entering the business. Sun will announce xVM soon, Microsofts developed Hyper-V … thus the market for it´s hypervisor may get narrow. At the end, the auxillary tools earn VMwares money, thus giving away the hypervisor is a clever move.