I've been using windows 8 for a while now on a XPS 14Z and I refuse to go back to windows 7. which now seems slow and antiquated. I have no problem with it what so ever. People aren't as dumb as techie like to think them to be. people switch from os to os all the time. people switch from windows to mac and back. people switch from iOS to android to windows phone and back all the time. people right now are just griping about there being a change. no one liked the start button when it was launched & we got ised to it and now people are complaining now that its gone. people were confused when you can go into dos from windows. there'll always be a small but loud group of people that will complain. in all honestly we're not losing anything in windows 8 & windows 8 pro. windows rt is no different than the iPads wall garden. & as for windows being difficult to use; http://gizmodo.com/5953561/watch-this-3+year+old-whiz-fly-around-windows-8-like-a-boss
if a 3 year old that could barely use a toilet grock windows 8 on an old desktop, laptops & tablets shouldn't be a challenge for the general public. will it sell as much as windows 7 which already has massive business & home adoption. No, that's because people just bought it. but it will do better than vista. which did better in adoption than OSX & Limux.