Like any large vendor that hosts a big event like VMworld, competition is also invited to the floor. Last year I saw a good Microsoft session at VMworld and although they told us how much better Hyper-V was then VMware ESX, nobody would find it strange that Microsoft was present.
This year I also expect Microsoft, Citrix, Novell, etc to be at VMworld and that they will have plenty of room to talk about their products and how much better they are. But when opening my VMworld bag and finding the VMworld Program Guide, I was a bit surprised to see that it was wrapped in a nice yellow paper from Citrix. Is this VMware displaying a god amount of self confidence?