Last night I was noted and did the live upgrade to Windows 8 Consumer Preview on my Compaq Mini. The installation went pretty flawless and "most" of my software & documents were retained. I was running Vista prior to the upgrade and figured I couldn't go from bad to worse but I think im at the border.
I will admit my mini runs a heck of a lot faster and boots up faster but the metro interface is useless as my max resolution is 1240x600 and 8 wants 1240x780 to allow the metro apps to function.
Besides that I can't really tell if all mymini apps are still there. Im not impressed with Windows 8 so far. It feels like Microsoft is considering their users to be idiots. Give them a simple interface, they don't need anything else.
Right now I would avoid Windows 8 like the plague and stick with windows 7 if you have a desktop or laptop. Now if you only surf the web, Facebook and twitter and are on a Windows phone or tablet then you might do ok. But if you are a power user, stay away.