Gone is the ability to perform a keyless install. I managed to download the .ISO file, burn a bootable DVD and start the install, but I forgot to get the product key. The MSDN/Technet site is so overloaded you can't do anything at the moment, so I'm unable to continue. More to come soon (I hope). It took a couple of hours due to the demand on the TechNet/MSDN website but finally was able to retreive a key.
Installation is easy. I did a clean install on a drive that Vista installed.
There is not much different between the previous "Preview" versions of Windows 8. Microsoft included a brief tutorial as part of install on where to move the mouse to find things. The Metro screen doesn't apply as the word "Metro" has been dropped. Since the screen with the tiles has the word "Start" in big letters located in the top left corner. I'll call it the Start screen.
Gone is the Desktop "Start" menu, a big disapointment for existing desktop and laptop users, you have a whole new world to explore if you decide to upgrade from your current version of Windows to Windows 8.
At least they have included the back button and X (close out) features in Internet Explorer.