I have got my hands on Windows 8 today. It seems to work really well for those with newer PCs, especially those on the latest. As for older PCs, don't try to run Windows 8 on those that are much older than 2 years. Anyway there is a steep learning curve to learn some of the new features Windows 8 has, but it isn't so bad once you get used to it. SSDs seem to benefit the most from Windows 8 due to its new features.
I'm just waiting on Intel's Haswell to be released next year since we'll be seeing how Windows 8 really shines. With the holiday shopping craze starting to begin in a few weeks, people will be looking for new tech gadgets at lower prices. The latest trend seems to be smartphones and tablets, but Windows 8 needs to make a big wow factor on consumers to really use the operating system.