I know this may be silly of me, but I'd like to take a break from the Win8/Metro bashing and actually talk about Win8 a little.
First of all, installing is a breeze. I did a fresh install to my SSD in about an hour, including installing Win7 first. Ran the setup out of Win7, no need to make a bootable disk. Setup process is definitely simplified from previous versions of Windows, and a bit faster than the Win7 setup.
No surprises on performance. It still boots insanely fast. It also seems a little more stable when overclocking both the CPU and GPU than Win7/Win8 RTM was with the same drivers. I was able to get my 3770k to validate at 5.075 GHz (up from about 4.9 GHz), and my 7970s hit 1200 MHz (up from 1175) stable under Bitcoin. Using CCC 12.11 Beta4.
An irritating issue with my mouse that plagued the RTM has been fixed in retail, so there's definitely some more polish if you tried the RTM. My WEI scores also went up from the RTM. Haven't gotten down to serious benching yet, so I can't report on any changes in those scores. Also haven't had a chance to do any gaming, though I'm looking forward to seeing if some issues I had with Dishonored have been resolved.