Red Hat Enterprise Linux 6.0 will feature improved power management, a broader system framework, many virtualization enhancements, greater optimizations for large scale deployments, improved manageability, more work on desktop environments, and a big emphasis on performance. There's nothing too specific, but it was learned from different Red Hat sessions today along with speaking to different employees. The improved power management for RHEL 6.0 should come as no surprise since several Red Hat engineers have been working on improving upstream power management for some months, including efforts to reduce GPU power. Virtualization is a very big topic at this year's Red Hat Summit in Chicago and it will be carried through into RHEL 6.0. The Kernel-based Virtual Machine was just included with RHEL 5.4, but it seems that in the 6.0 release it will really become Red Hat's flagship virtualization option. Xen will remain an option in RHEL 6.0, but it appears as if Red Hat will be throwing nearly all of their weight behind KVM.
More information is on the way,