If you had any doubt about how dominate MS will be check this link out
http://www.microsoft.com/windowsserversystem/virtualserver/evaluation/news/bulletins/vs05pricing.mspx
We really utilize VMware a lot and I was very worried that the cost of MS
licenses would become a huge negative. I mean, we have atleast 10
2003 enterprise vm's on each physical box and we are having to pay for each
one. And, we are paying for VMware. Now, we would just pay for one Enterprise license and get the virtual infrastructure and four virtual licenses.
I would hate to be a MS competitor but you gotta admit this is a master move
when it comes to hurting your competition and convincing IT managers to
continue to use and grow the MS side of things.