I've read that Microsoft hasn't even decide what "feature route" to go. One route their considering is to completely change the G.U.I. for the next Windows operating system. At least Windows vista was somewhat similar to XP, that if users were familiar with the previous and wanted to upgrade to the new operating system they wouldn't be completely lost. It seems with Windows "Vienna" people would have to learn something "new"..like teaching a dog "new tricks."