I'm just as excited about Windows 8 as Drew, we have one difference of opinion in regards to the upcoming OS, but we're not going to allow that to come between us. While I do believe that Windows 7 is a really great OS, which hasn't really peaked yet, I do like to move forward when things are looking good.
While I'll continue to run Windows 7 on my much more powerful notebook that's a little over a year old, my HP desktop that shipped with Windows 7 is a low-spec one. It has benefited greatly from the exceptional power management (especially CPU) that Windows 8 CP & RP has offered. Which I'll be obtaining about a month after release, around the same timeframe that I bought this desktop (Nov 2009).
So in the end, I'll have the best of both worlds. Keep the stable proven OS on my notebook, the latest on my desktop. Hopefully the lowered CPU requirements will allow the PC to last until Windows 9, assuming that's the name of the OS to be released in 2015.