"RHEL is Red Hat's flagship platform and the inclusion of KVM is the first really big shift for Red Hat's new virtualization roadmap which favors KVM. Red Hat also has - in private beta - a standalone KVM hypervisor product as well as new server and desktop virtualization management application.
"While KVM is the big new item in RHEL 5.4, there are also a few other goodies for users to try out."