Boot to desktop: http://winsupersite.com/windows-8/hands-windows-81-boot-desktop
I just installed Win 8.1. It took about an hour and all is well. I changed my lock screen on my Surface Pro to be the desktop picture I use on the desktop. It looks good, fast, and I have yet to figure out how to boot directly to the desktop. One of the few complaints I have for Win 8 is that I find the apps don't function as well as on standard Win 7 applications. I'm referring specifically to Kindle, Evernote, and any file search apps or picture display apps, at least as far as I can tell up to now.
installed it about an hour ago. don't forget to snatch the updates AFTER the 8.1 is installed.