Ummm, I'm torn on this one
On a personal level - RedHat isn't doing their customers or themselves a favour in the long run by doing that. RHEL5 (2.6.18) is already woefully obsolete now to run bare metal on a modern server, and RHEL6 (2.6.32) isn't far behind as Intel/AMD have been revving their proc/chipset architectures. With that said, virtualization has pretty much taken over, so running RHEL on bare metal hardware isn't as prevalent as a couple of years ago. I've always thought that the expense and risk of continually backporting fixes from newer component releases (like the kernel) was a bad idea going past 2-3 years though.
HOWEVER, looking at it from a corporate view - Did they just say 10 years of "no upgrades", sign us up! Particularly since RHEL upgrades have been hit and miss in the past.
Penguin, cuz its a Penguin article innit? :)