I last used Windows 8 on an Asus EP121 Slate (tablet) back in September, 2011. It seems even sleeker and more robust now, so much so that I decided to leave it on my machine permanently.
The MS rep at the seminar today also told us the official release date for Windows 8 and gave us a link to sign up early to be a developer and publish apps on the new Windows appstore.
Here's what Windows 8 looks like on the 15" Samsung Series 9:
You can see more videos on my youtube channel.