virtualization and its effects on organization in managers point of view !

hello ,
recently i started to search about the different effects of virtualization on organizations !
not from IT managers point of view , but from staffs and head managers , what will be their reactions to changing organizations to use virtual machins ,
why they refuse ?!
how virtualization minmize their permissions ?
why head managers refuse ?
is it related to old staffs which is not like to keep up with envirement changes ?
and many other questions that a manager (non-it) will ask about the effect of this technology on his organizations

i will be glad if you people share your experience with me or if you found any useful link related to these issues .